diff --git a/Modules/Segmentation/Interactions/mitknnUnetTool.cpp b/Modules/Segmentation/Interactions/mitknnUnetTool.cpp
index c2db0bcca3..bacb78f4cb 100644
--- a/Modules/Segmentation/Interactions/mitknnUnetTool.cpp
+++ b/Modules/Segmentation/Interactions/mitknnUnetTool.cpp
@@ -1,322 +1,340 @@
 /*============================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center (DKFZ)
 All rights reserved.
 
 Use of this source code is governed by a 3-clause BSD license that can be
 found in the LICENSE file.
 
 ============================================================================*/
 
 #include "mitknnUnetTool.h"
 
 #include "mitkIOUtil.h"
 #include "mitkProcessExecutor.h"
 #include <itksys/SystemTools.hxx>
 #include <usGetModuleContext.h>
 #include <usModule.h>
 #include <usModuleContext.h>
 #include <usModuleResource.h>
 
 namespace mitk
 {
   MITK_TOOL_MACRO(MITKSEGMENTATION_EXPORT, nnUNetTool, "nnUNet tool");
 }
 
 mitk::nnUNetTool::nnUNetTool()
 {
   this->SetMitkTempDir(IOUtil::CreateTemporaryDirectory("mitk-XXXXXX"));
 }
 
 mitk::nnUNetTool::~nnUNetTool()
 {
   itksys::SystemTools::RemoveADirectory(this->GetMitkTempDir());
 }
 
 void mitk::nnUNetTool::Activated()
 {
   Superclass::Activated();
   m_InputOutputPair = std::make_pair(nullptr, nullptr);
 }
 
 void mitk::nnUNetTool::UpdateCleanUp()
 {
   // This overriden method is intentionally left out for setting later upon demand
   // in the `RenderOutputBuffer` method.
 }
 
 void mitk::nnUNetTool::RenderOutputBuffer()
 {
   if (this->m_OutputBuffer != nullptr)
   {
     Superclass::SetNodeProperties(this->m_OutputBuffer);
     this->ClearOutputBuffer();
     try
     {
       if (nullptr != this->GetPreviewSegmentationNode())
       {
         this->GetPreviewSegmentationNode()->SetVisibility(!this->GetSelectedLabels().empty());
       }
       if (this->GetSelectedLabels().empty())
       {
         this->ResetPreviewNode();
       }
     }
     catch (const mitk::Exception &e)
     {
       MITK_INFO << e.GetDescription();
     }
   }
 }
 
 void mitk::nnUNetTool::SetNodeProperties(LabelSetImage::Pointer segmentation)
 {
   // This overriden method doesn't set node properties. Intentionally left out for setting later upon demand
   // in the `RenderOutputBuffer` method.
   this->m_OutputBuffer = segmentation;
 }
 
 mitk::LabelSetImage::Pointer mitk::nnUNetTool::GetOutputBuffer()
 {
   return this->m_OutputBuffer;
 }
 
 void mitk::nnUNetTool::ClearOutputBuffer()
 {
   this->m_OutputBuffer = nullptr;
 }
 
 us::ModuleResource mitk::nnUNetTool::GetIconResource() const
 {
   us::Module *module = us::GetModuleContext()->GetModule();
   us::ModuleResource resource = module->GetResource("Watershed_48x48.png");
   return resource;
 }
 
 const char **mitk::nnUNetTool::GetXPM() const
 {
   return nullptr;
 }
 
 const char *mitk::nnUNetTool::GetName() const
 {
   return "nnUNet";
 }
 
 mitk::DataStorage *mitk::nnUNetTool::GetDataStorage()
 {
   return this->GetToolManager()->GetDataStorage();
 }
 
 mitk::DataNode *mitk::nnUNetTool::GetRefNode()
 {
   return this->GetToolManager()->GetReferenceData(0);
 }
 
 namespace
 {
   void onPythonProcessEvent(itk::Object * /*pCaller*/, const itk::EventObject &e, void *)
   {
     std::string testCOUT;
     std::string testCERR;
     const auto *pEvent = dynamic_cast<const mitk::ExternalProcessStdOutEvent *>(&e);
 
     if (pEvent)
     {
       testCOUT = testCOUT + pEvent->GetOutput();
       MITK_INFO << testCOUT;
     }
 
     const auto *pErrEvent = dynamic_cast<const mitk::ExternalProcessStdErrEvent *>(&e);
 
     if (pErrEvent)
     {
       testCERR = testCERR + pErrEvent->GetOutput();
       MITK_ERROR << testCERR;
     }
   }
 } // namespace
 
 mitk::LabelSetImage::Pointer mitk::nnUNetTool::ComputeMLPreview(const Image *inputAtTimeStep, TimeStepType /*timeStep*/)
 {
   if (m_InputOutputPair.first == inputAtTimeStep)
   {
     return m_InputOutputPair.second;
   }
   std::string inDir, outDir, inputImagePath, outputImagePath, scriptPath;
   std::string templateFilename = "XXXXXX_000_0000.nii.gz";
 
   ProcessExecutor::Pointer spExec = ProcessExecutor::New();
   itk::CStyleCommand::Pointer spCommand = itk::CStyleCommand::New();
   spCommand->SetCallback(&onPythonProcessEvent);
   spExec->AddObserver(ExternalProcessOutputEvent(), spCommand);
   ProcessExecutor::ArgumentListType args;
 
   inDir = IOUtil::CreateTemporaryDirectory("nnunet-in-XXXXXX", this->GetMitkTempDir());
   std::ofstream tmpStream;
   inputImagePath = IOUtil::CreateTemporaryFile(tmpStream, templateFilename, inDir + IOUtil::GetDirectorySeparator());
   tmpStream.close();
   std::size_t found = inputImagePath.find_last_of(IOUtil::GetDirectorySeparator());
   std::string fileName = inputImagePath.substr(found + 1);
   std::string token = fileName.substr(0, fileName.find("_"));
 
   if (this->GetNoPip())
   {
     scriptPath = this->GetnnUNetDirectory() + IOUtil::GetDirectorySeparator() + "nnunet" +
                  IOUtil::GetDirectorySeparator() + "inference" + IOUtil::GetDirectorySeparator() + "predict_simple.py";
   }
 
   try
   {
     IOUtil::Save(inputAtTimeStep, inputImagePath);
 
     if (this->GetMultiModal())
     {
+      std::string outModalFile;
+      int len = inDir.length() + token.length() + 1 + 8 + 2 + 7;
+      outModalFile.reserve(len);
       for (size_t i = 0; i < this->m_OtherModalPaths.size(); ++i)
       {
         mitk::Image::ConstPointer modalImage = this->m_OtherModalPaths[i];
-        std::string outModalFile =
-          inDir + IOUtil::GetDirectorySeparator() + token + "_000_000" + std::to_string(i + 1) + ".nii.gz";
+        outModalFile.append(inDir);
+        outModalFile.push_back(IOUtil::GetDirectorySeparator());
+        outModalFile.append(token);
+        outModalFile.append("_000_000");
+        outModalFile.append(std::to_string(i + 1));
+        outModalFile.append(".nii.gz");
         IOUtil::Save(modalImage.GetPointer(), outModalFile);
+        outModalFile.clear();
       }
     }
   }
   catch (const mitk::Exception &e)
   {
     /*
     Can't throw mitk exception to the caller. Refer: T28691
     */
     MITK_ERROR << e.GetDescription();
     return nullptr;
   }
   // Code calls external process
   std::string command = "nnUNet_predict";
   if (this->GetNoPip())
   {
 #ifdef _WIN32
     command = "python";
 #else
     command = "python3";
 #endif
   }
   for (ModelParams &modelparam : m_ParamQ)
   {
     outDir = IOUtil::CreateTemporaryDirectory("nnunet-out-XXXXXX", this->GetMitkTempDir());
     outputImagePath = outDir + IOUtil::GetDirectorySeparator() + token + "_000.nii.gz";
     modelparam.outputDir = outDir;
     args.clear();
     if (this->GetNoPip())
     {
       args.push_back(scriptPath);
     }
     args.push_back("-i");
     args.push_back(inDir);
 
     args.push_back("-o");
     args.push_back(outDir);
 
     args.push_back("-t");
     args.push_back(modelparam.task);
 
     if (modelparam.model.find("cascade") != std::string::npos)
     {
       args.push_back("-ctr");
     }
     else
     {
       args.push_back("-tr");
     }
     args.push_back(modelparam.trainer);
 
     args.push_back("-m");
     args.push_back(modelparam.model);
 
     args.push_back("-p");
     args.push_back(modelparam.planId);
 
     if (!modelparam.folds.empty())
     {
       args.push_back("-f");
       for (auto fold : modelparam.folds)
       {
         args.push_back(fold);
       }
     }
 
     args.push_back("--num_threads_nifti_save");
     args.push_back("1"); // fixing to 1
 
     if (!this->GetMirror())
     {
       args.push_back("--disable_tta");
     }
 
     if (!this->GetMixedPrecision())
     {
       args.push_back("--disable_mixed_precision");
     }
 
-    if (this->GetEnsemble() && !this->GetPostProcessingJsonDirectory().empty())
+    if (this->GetEnsemble())
     {
       args.push_back("--save_npz");
     }
 
     try
     {
+    for (auto arg : args)
+    {
+      MITK_INFO << arg;
+    }
       std::string resultsFolderEnv = "RESULTS_FOLDER=" + this->GetModelDirectory();
       itksys::SystemTools::PutEnv(resultsFolderEnv.c_str());
       std::string cudaEnv = "CUDA_VISIBLE_DEVICES=" + std::to_string(this->GetGpuId());
       itksys::SystemTools::PutEnv(cudaEnv.c_str());
 
       spExec->Execute(this->GetPythonPath(), command, args);
     }
     catch (const mitk::Exception &e)
     {
       /*
       Can't throw mitk exception to the caller. Refer: T28691
       */
       MITK_ERROR << e.GetDescription();
       return nullptr;
     }
   }
   if (this->GetEnsemble() && !this->GetPostProcessingJsonDirectory().empty())
   {
     args.clear();
     command = "nnUNet_ensemble";
     outDir = IOUtil::CreateTemporaryDirectory("nnunet-ensemble-out-XXXXXX", this->GetMitkTempDir());
     outputImagePath = outDir + IOUtil::GetDirectorySeparator() + token + "_000.nii.gz";
 
     args.push_back("-f");
     for (ModelParams &modelparam : m_ParamQ)
     {
       args.push_back(modelparam.outputDir);
     }
 
     args.push_back("-o");
     args.push_back(outDir);
 
-    args.push_back("-pp");
-    args.push_back(this->GetPostProcessingJsonDirectory());
-
+    if (!this->GetPostProcessingJsonDirectory().empty())
+    {
+      args.push_back("-pp");
+      args.push_back(this->GetPostProcessingJsonDirectory());
+    }
+    for (auto arg : args)
+    {
+      MITK_INFO << arg;
+    }
     spExec->Execute(this->GetPythonPath(), command, args);
   }
   try
   {
     LabelSetImage::Pointer resultImage = LabelSetImage::New();
     Image::Pointer outputImage = IOUtil::Load<Image>(outputImagePath);
     resultImage->InitializeByLabeledImage(outputImage);
     resultImage->SetGeometry(inputAtTimeStep->GetGeometry());
     m_InputOutputPair = std::make_pair(inputAtTimeStep, resultImage);
     return resultImage;
   }
   catch (const mitk::Exception &e)
   {
     /*
     Can't throw mitk exception to the caller. Refer: T28691
     */
     MITK_ERROR << e.GetDescription();
     return nullptr;
   }
 }
diff --git a/Modules/SegmentationUI/Qmitk/QmitknnUNetEnsembleLayout.h b/Modules/SegmentationUI/Qmitk/QmitknnUNetEnsembleLayout.h
index 881cb52567..9a5f009830 100644
--- a/Modules/SegmentationUI/Qmitk/QmitknnUNetEnsembleLayout.h
+++ b/Modules/SegmentationUI/Qmitk/QmitknnUNetEnsembleLayout.h
@@ -1,86 +1,91 @@
 /*============================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center (DKFZ)
 All rights reserved.
 
 Use of this source code is governed by a 3-clause BSD license that can be
 found in the LICENSE file.s
 
 ============================================================================*/
 
 #ifndef QmitknnUNetEnsembleLayout_h_Included
 #define QmitknnUNetEnsembleLayout_h_Included
 
 
 #include <QtWidgets/QGridLayout>
 #include <QtWidgets/QVBoxLayout>
 #include <QtWidgets/QWidget>
 #include <QtWidgets/QLabel>
 #include <ctkCheckableComboBox.h>
 #include <ctkComboBox.h>
 #include <MitkSegmentationUIExports.h>
 
 
 QT_BEGIN_NAMESPACE
 
 class MITKSEGMENTATIONUI_EXPORT QmitknnUNetTaskParamsUITemplate
 {
 
 public:
   QLabel* trainerLabel;
   ctkComboBox* trainerBox;
   QLabel* plannerLabel;
   ctkComboBox* plannerBox;
   QLabel* foldLabel;
   ctkCheckableComboBox* foldBox;
   QLabel* modelLabel;
   ctkComboBox* modelBox;
   QWidget* parent;
 
   QmitknnUNetTaskParamsUITemplate(QWidget* inputGroupBox_1)
   {
     this->parent = inputGroupBox_1;
     QVBoxLayout* verticalLayout_x = new QVBoxLayout(inputGroupBox_1);
     verticalLayout_x->setObjectName(QString::fromUtf8("verticalLayout_x"));
     QGridLayout* g_x = new QGridLayout();
 #ifndef Q_OS_MAC
     g_x->setSpacing(6);
 #endif
 #ifndef Q_OS_MAC
     g_x->setContentsMargins(0, 0, 0, 0);
 #endif
     g_x->setObjectName(QString::fromUtf8("g_2"));
 
     modelLabel = new QLabel("Configuration", inputGroupBox_1);
     g_x->addWidget(modelLabel, 0, 0, 1, 1);
     trainerLabel = new QLabel("Trainer", inputGroupBox_1);
     g_x->addWidget(trainerLabel, 0, 1, 1, 1);
 
     modelBox = new ctkComboBox(inputGroupBox_1);
     modelBox->setObjectName(QString::fromUtf8("modelBox_1"));
     g_x->addWidget(modelBox, 1, 0, 1, 1);
     trainerBox = new ctkComboBox(inputGroupBox_1);
     trainerBox->setObjectName(QString::fromUtf8("trainerBox_1"));
     g_x->addWidget(trainerBox, 1, 1, 1, 1);
 
     plannerLabel = new QLabel("Planner", inputGroupBox_1);
     g_x->addWidget(plannerLabel, 2, 0, 1, 1);
     foldLabel = new QLabel("Fold", inputGroupBox_1);
     g_x->addWidget(foldLabel, 2, 1, 1, 1);
 
     plannerBox = new ctkComboBox(inputGroupBox_1);
     plannerBox->setObjectName(QString::fromUtf8("plannerBox_1"));
     g_x->addWidget(plannerBox, 3, 0, 1, 1);
     foldBox = new ctkCheckableComboBox(inputGroupBox_1);
     foldBox->setObjectName(QString::fromUtf8("foldBox_1"));
     g_x->addWidget(foldBox, 3, 1, 1, 1);
 
     verticalLayout_x->addLayout(g_x);
   }
+
+  void setVisible(bool visiblity)
+  {
+    this->parent->setVisible(visiblity);
+  }
 };
 QT_END_NAMESPACE
 
 #endif
 
diff --git a/Modules/SegmentationUI/Qmitk/QmitknnUNetToolGUI.cpp b/Modules/SegmentationUI/Qmitk/QmitknnUNetToolGUI.cpp
index ea0b15c38b..64082d4a0f 100644
--- a/Modules/SegmentationUI/Qmitk/QmitknnUNetToolGUI.cpp
+++ b/Modules/SegmentationUI/Qmitk/QmitknnUNetToolGUI.cpp
@@ -1,328 +1,385 @@
 /*============================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center (DKFZ)
 All rights reserved.
 
 Use of this source code is governed by a 3-clause BSD license that can be
 found in the LICENSE file.
 
 ============================================================================*/
 
 #include "QmitknnUNetToolGUI.h"
 
 #include "mitknnUnetTool.h"
 #include <QApplication>
 #include <QDir>
 #include <QIcon>
 #include <QtGlobal>
 
 MITK_TOOL_GUI_MACRO(MITKSEGMENTATIONUI_EXPORT, QmitknnUNetToolGUI, "")
 
 QmitknnUNetToolGUI::QmitknnUNetToolGUI() : QmitkAutoMLSegmentationToolGUIBase()
 {
   // Nvidia-smi command returning zero doesn't alway mean lack of GPUs.
   // Pytorch uses its own libraries to communicate to the GPUs. Hence, only a warning can be given.
   if (m_GpuLoader.GetGPUCount() == 0)
   {
     std::string warning = "WARNING: No GPUs were detected on your machine. The nnUNet tool might not work.";
     ShowErrorMessage(warning);
   }
 
   // define predicates for multi modal data selection combobox
   auto imageType = mitk::TNodePredicateDataType<mitk::Image>::New();
   auto labelSetImageType = mitk::NodePredicateNot::New(mitk::TNodePredicateDataType<mitk::LabelSetImage>::New());
   this->m_MultiModalPredicate = mitk::NodePredicateAnd::New(imageType, labelSetImageType).GetPointer();
 }
 
 void QmitknnUNetToolGUI::ConnectNewTool(mitk::AutoSegmentationWithPreviewTool *newTool)
 {
   Superclass::ConnectNewTool(newTool);
   newTool->IsTimePointChangeAwareOff();
 }
 
 void QmitknnUNetToolGUI::InitializeUI(QBoxLayout *mainLayout)
 {
   m_Controls.setupUi(this);
 #ifndef _WIN32
   m_Controls.pythonEnvComboBox->addItem("/usr/bin");
 #endif
   m_Controls.pythonEnvComboBox->addItem("Select");
   AutoParsePythonPaths();
   connect(m_Controls.previewButton, SIGNAL(clicked()), this, SLOT(OnPreviewRequested()));
   connect(m_Controls.modeldirectoryBox,
           SIGNAL(directoryChanged(const QString &)),
           this,
           SLOT(OnDirectoryChanged(const QString &)));
   connect(
     m_Controls.modelBox, SIGNAL(currentTextChanged(const QString &)), this, SLOT(OnModelChanged(const QString &)));
   connect(m_Controls.taskBox, SIGNAL(currentTextChanged(const QString &)), this, SLOT(OnTaskChanged(const QString &)));
   connect(
     m_Controls.plannerBox, SIGNAL(currentTextChanged(const QString &)), this, SLOT(OnTrainerChanged(const QString &)));
   connect(m_Controls.nopipBox, SIGNAL(stateChanged(int)), this, SLOT(OnCheckBoxChanged(int)));
   connect(m_Controls.multiModalBox, SIGNAL(stateChanged(int)), this, SLOT(OnCheckBoxChanged(int)));
   connect(m_Controls.multiModalSpinBox, SIGNAL(valueChanged(int)), this, SLOT(OnModalitiesNumberChanged(int)));
   connect(m_Controls.posSpinBox, SIGNAL(valueChanged(int)), this, SLOT(OnModalPositionChanged(int)));
   connect(m_Controls.pythonEnvComboBox,
 #if QT_VERSION >= 0x050F00 // 5.15
           SIGNAL(textActivated(const QString &)),
 #elif QT_VERSION >= 0x050C00 // 5.12
           SIGNAL(activated(const QString &)),
 #endif
           this,
           SLOT(OnPythonPathChanged(const QString &)));
   connect(m_Controls.refreshdirectoryBox, SIGNAL(clicked()), this, SLOT(OnRefreshPresssed()));
 
   m_Controls.codedirectoryBox->setVisible(false);
   m_Controls.nnUnetdirLabel->setVisible(false);
   m_Controls.multiModalSpinBox->setVisible(false);
   m_Controls.multiModalSpinLabel->setVisible(false);
   m_Controls.posSpinBoxLabel->setVisible(false);
   m_Controls.posSpinBox->setVisible(false);
   m_Controls.previewButton->setEnabled(false);
 
   QSize sz(16, 16);
   m_Controls.stopButton->setVisible(false);
 
   QIcon refreshIcon;
   refreshIcon.addPixmap(style()->standardIcon(QStyle::SP_BrowserReload).pixmap(sz), QIcon::Normal, QIcon::Off);
   m_Controls.refreshdirectoryBox->setIcon(refreshIcon);
   m_Controls.refreshdirectoryBox->setEnabled(true);
 
   m_Controls.statusLabel->setTextFormat(Qt::RichText);
-  m_Controls.statusLabel->setText("<b>STATUS: </b><i>Welcome to nnUNet. " + QString::number(m_GpuLoader.GetGPUCount()) +
-                                  " GPUs were detected.</i>");
-
+  ShowStatusMessage(QString("<b>STATUS: </b><i>Welcome to nnUNet. " + QString::number(m_GpuLoader.GetGPUCount()) +
+                            " GPUs were detected.</i>"));
   if (m_GpuLoader.GetGPUCount() != 0)
   {
     m_Controls.gpuSpinBox->setMaximum(m_GpuLoader.GetGPUCount() - 1);
   }
   mainLayout->addLayout(m_Controls.verticalLayout);
   Superclass::InitializeUI(mainLayout);
   m_UI_ROWS = m_Controls.advancedSettingsLayout->rowCount(); // Must do. Row count is correct only here.
 }
 
 void QmitknnUNetToolGUI::OnPreviewRequested()
 {
   mitk::nnUNetTool::Pointer tool = this->GetConnectedToolAs<mitk::nnUNetTool>();
   if (nullptr != tool)
   {
     try
     {
       m_Controls.previewButton->setEnabled(false); // To prevent misclicked back2back prediction.
       qApp->processEvents();
       tool->PredictOn(); // purposefully placed to make tool->GetMTime different than before.
       QString modelName = m_Controls.modelBox->currentText();
       if (modelName.startsWith("ensemble", Qt::CaseInsensitive))
       {
         ProcessEnsembleModelsParams(tool);
       }
       else
       {
         ProcessModelParams(tool);
       }
       QString pythonPathTextItem = m_Controls.pythonEnvComboBox->currentText();
       QString pythonPath = pythonPathTextItem.mid(pythonPathTextItem.indexOf(" ") + 1);
       bool isNoPip = m_Controls.nopipBox->isChecked();
 #ifdef _WIN32
       if (!isNoPip && !(pythonPath.endsWith("Scripts", Qt::CaseInsensitive) ||
                         pythonPath.endsWith("Scripts/", Qt::CaseInsensitive)))
       {
         pythonPath += QDir::separator() + QString("Scripts");
       }
 #else
       if (!(pythonPath.endsWith("bin", Qt::CaseInsensitive) || pythonPath.endsWith("bin/", Qt::CaseInsensitive)))
       {
         pythonPath += QDir::separator() + QString("bin");
       }
 #endif
       std::string nnUNetDirectory;
       if (isNoPip)
       {
         nnUNetDirectory = m_Controls.codedirectoryBox->directory().toStdString();
       }
       else if (!IsNNUNetInstalled(pythonPath))
       {
         throw std::runtime_error("nnUNet is not detected in the selected python environment. Please select a valid "
                                  "python environment or install nnUNet.");
       }
 
       tool->SetnnUNetDirectory(nnUNetDirectory);
       tool->SetPythonPath(pythonPath.toStdString());
       tool->SetModelDirectory(m_ParentFolder->getResultsFolder().toStdString());
       // checkboxes
       tool->SetMirror(m_Controls.mirrorBox->isChecked());
       tool->SetMixedPrecision(m_Controls.mixedPrecisionBox->isChecked());
       tool->SetNoPip(isNoPip);
       tool->SetMultiModal(m_Controls.multiModalBox->isChecked());
       // Spinboxes
       tool->SetGpuId(static_cast<unsigned int>(m_Controls.gpuSpinBox->value()));
       // Multi-Modal
       tool->MultiModalOff();
       if (m_Controls.multiModalBox->isChecked())
       {
         tool->m_OtherModalPaths.clear();
         tool->m_OtherModalPaths = FetchMultiModalImagesFromUI();
         tool->MultiModalOn();
       }
       tool->m_InputOutputPair = std::make_pair(nullptr, nullptr);
-      m_Controls.statusLabel->setText("<b>STATUS: </b><i>Starting Segmentation task... This might take a while.</i>");
+      ShowStatusMessage(QString("<b>STATUS: </b><i>Starting Segmentation task... This might take a while.</i>"));
       tool->UpdatePreview();
       if (tool->GetOutputBuffer() == nullptr)
       {
         SegmentationProcessFailed();
       }
       SegmentationResultHandler(tool);
       tool->PredictOff(); // purposefully placed to make tool->GetMTime different than before.
       m_Controls.previewButton->setEnabled(true);
     }
     catch (const std::exception &e)
     {
       std::stringstream errorMsg;
       errorMsg << "Error while processing parameters for nnUNet segmentation. Reason: " << e.what();
       ShowErrorMessage(errorMsg.str());
+      ShowStatusMessage(QString::fromStdString(errorMsg.str()));
       m_Controls.previewButton->setEnabled(true);
       tool->PredictOff();
       return;
     }
     catch (...)
     {
       std::string errorMsg = "Unkown error occured while generation nnUNet segmentation.";
       ShowErrorMessage(errorMsg);
       m_Controls.previewButton->setEnabled(true);
       tool->PredictOff();
       return;
     }
   }
 }
 
 std::vector<mitk::Image::ConstPointer> QmitknnUNetToolGUI::FetchMultiModalImagesFromUI()
 {
   std::vector<mitk::Image::ConstPointer> paths;
   if (m_Controls.multiModalBox->isChecked() && !m_Modalities.empty())
   {
     for (QmitkDataStorageComboBox *modality : m_Modalities)
     {
       if (modality->objectName() != "multiModal_0")
       {
         paths.push_back(dynamic_cast<const mitk::Image *>(modality->GetSelectedNode()->GetData()));
       }
     }
   }
   return paths;
 }
 
 bool QmitknnUNetToolGUI::IsNNUNetInstalled(const QString &pythonPath)
 {
   QString fullPath = pythonPath;
 #ifdef _WIN32
   if (!(fullPath.endsWith("Scripts", Qt::CaseInsensitive) || fullPath.endsWith("Scripts/", Qt::CaseInsensitive)))
   {
     fullPath += QDir::separator() + QString("Scripts");
   }
 #else
   if (!(fullPath.endsWith("bin", Qt::CaseInsensitive) || fullPath.endsWith("bin/", Qt::CaseInsensitive)))
   {
     fullPath += QDir::separator() + QString("bin");
   }
 #endif
   fullPath = fullPath.mid(fullPath.indexOf(" ") + 1);
   return QFile::exists(fullPath + QDir::separator() + QString("nnUNet_predict"));
 }
 
 void QmitknnUNetToolGUI::ShowErrorMessage(const std::string &message, QMessageBox::Icon icon)
 {
   this->setCursor(Qt::ArrowCursor);
   QMessageBox *messageBox = new QMessageBox(icon, nullptr, message.c_str());
   messageBox->exec();
   delete messageBox;
   MITK_WARN << message;
 }
 
+void QmitknnUNetToolGUI::ShowStatusMessage(const QString &message)
+{
+  m_Controls.statusLabel->setText(message);
+}
+
 void QmitknnUNetToolGUI::ProcessEnsembleModelsParams(mitk::nnUNetTool::Pointer tool)
 {
   if (m_EnsembleParams[0]->modelBox->currentText() == m_EnsembleParams[1]->modelBox->currentText())
   {
     throw std::runtime_error("Both models you have selected for ensembling are the same.");
   }
   QString taskName = m_Controls.taskBox->currentText();
+  bool isPPJson = m_Controls.postProcessingCheckBox->isChecked();
   std::vector<mitk::ModelParams> requestQ;
   QString ppDirFolderNamePart1 = "ensemble_";
   QStringList ppDirFolderNameParts;
   for (std::unique_ptr<QmitknnUNetTaskParamsUITemplate> &layout : m_EnsembleParams)
   {
     QStringList ppDirFolderName;
     QString modelName = layout->modelBox->currentText();
     ppDirFolderName << modelName;
     ppDirFolderName << "__";
     QString trainer = layout->trainerBox->currentText();
     ppDirFolderName << trainer;
     ppDirFolderName << "__";
     QString planId = layout->plannerBox->currentText();
     ppDirFolderName << planId;
 
     if (!IsModelExists(modelName, taskName, QString(trainer + "__" + planId)))
     {
       std::string errorMsg = "The configuration " + modelName.toStdString() +
                              " you have selected doesn't exist. Check your Results Folder again.";
       throw std::runtime_error(errorMsg);
     }
-    std::vector<std::string> testfold; // empty vector to consider all folds for inferencing.
+    std::vector<std::string> testfold = FetchSelectedFoldsFromUI(layout->foldBox);
     mitk::ModelParams modelObject = MapToRequest(modelName, taskName, trainer, planId, testfold);
     requestQ.push_back(modelObject);
     ppDirFolderNameParts << ppDirFolderName.join(QString(""));
   }
   tool->EnsembleOn();
-
-  QString ppJsonFilePossibility1 = QDir::cleanPath(
-    m_ParentFolder->getResultsFolder() + QDir::separator() + "nnUNet" + QDir::separator() + "ensembles" +
-    QDir::separator() + taskName + QDir::separator() + ppDirFolderNamePart1 + ppDirFolderNameParts.first() + "--" +
-    ppDirFolderNameParts.last() + QDir::separator() + "postprocessing.json");
-  QString ppJsonFilePossibility2 = QDir::cleanPath(
-    m_ParentFolder->getResultsFolder() + QDir::separator() + "nnUNet" + QDir::separator() + "ensembles" +
-    QDir::separator() + taskName + QDir::separator() + ppDirFolderNamePart1 + ppDirFolderNameParts.last() + "--" +
-    ppDirFolderNameParts.first() + QDir::separator() + "postprocessing.json");
-
-  if (QFile(ppJsonFilePossibility1).exists())
-  {
-    tool->SetPostProcessingJsonDirectory(ppJsonFilePossibility1.toStdString());
-  }
-  else if (QFile(ppJsonFilePossibility2).exists())
-  {
-    tool->SetPostProcessingJsonDirectory(ppJsonFilePossibility2.toStdString());
-  }
-  else
+  if (isPPJson)
   {
-    // warning message
+    QString ppJsonFilePossibility1 = QDir::cleanPath(
+      m_ParentFolder->getResultsFolder() + QDir::separator() + "nnUNet" + QDir::separator() + "ensembles" +
+      QDir::separator() + taskName + QDir::separator() + ppDirFolderNamePart1 + ppDirFolderNameParts.first() + "--" +
+      ppDirFolderNameParts.last() + QDir::separator() + "postprocessing.json");
+    QString ppJsonFilePossibility2 = QDir::cleanPath(
+      m_ParentFolder->getResultsFolder() + QDir::separator() + "nnUNet" + QDir::separator() + "ensembles" +
+      QDir::separator() + taskName + QDir::separator() + ppDirFolderNamePart1 + ppDirFolderNameParts.last() + "--" +
+      ppDirFolderNameParts.first() + QDir::separator() + "postprocessing.json");
+
+    if (QFile(ppJsonFilePossibility1).exists())
+    {
+      tool->SetPostProcessingJsonDirectory(ppJsonFilePossibility1.toStdString());
+      const QString statusMsg = "<i>Post Processing JSON file found: </i>" + ppJsonFilePossibility1;
+      ShowStatusMessage(statusMsg);
+    }
+    else if (QFile(ppJsonFilePossibility2).exists())
+    {
+      tool->SetPostProcessingJsonDirectory(ppJsonFilePossibility2.toStdString());
+      const QString statusMsg = "<i>Post Processing JSON file found:</i>" + ppJsonFilePossibility2;
+      ShowStatusMessage(statusMsg);
+    }
+    else
+    {
+      std::string errorMsg =
+        "No post processing file was found for the selected ensemble combination. Continuing anyway...";
+      ShowErrorMessage(errorMsg);
+    }
   }
   tool->m_ParamQ.clear();
   tool->m_ParamQ = requestQ;
 }
 
 void QmitknnUNetToolGUI::ProcessModelParams(mitk::nnUNetTool::Pointer tool)
 {
   tool->EnsembleOff();
   std::vector<mitk::ModelParams> requestQ;
   QString modelName = m_Controls.modelBox->currentText();
   QString taskName = m_Controls.taskBox->currentText();
   QString trainer = m_Controls.trainerBox->currentText();
   QString planId = m_Controls.plannerBox->currentText();
-  std::vector<std::string> fetchedFolds = FetchSelectedFoldsFromUI();
+  std::vector<std::string> fetchedFolds = FetchSelectedFoldsFromUI(m_Controls.foldBox);
   mitk::ModelParams modelObject = MapToRequest(modelName, taskName, trainer, planId, fetchedFolds);
   requestQ.push_back(modelObject);
   tool->m_ParamQ.clear();
   tool->m_ParamQ = requestQ;
 }
 
 bool QmitknnUNetToolGUI::IsModelExists(const QString &modelName, const QString &taskName, const QString &trainerPlanner)
 {
   QString modelSearchPath =
     QDir::cleanPath(m_ParentFolder->getResultsFolder() + QDir::separator() + "nnUNet" + QDir::separator() + modelName +
                     QDir::separator() + taskName + QDir::separator() + trainerPlanner);
   if (QDir(modelSearchPath).exists())
   {
     return true;
   }
   return false;
 }
+
+void QmitknnUNetToolGUI::CheckAllInCheckableComboBox(ctkCheckableComboBox *foldBox)
+{
+  // Recalling all added items to check-mark it.
+  const QAbstractItemModel *qaim = foldBox->checkableModel();
+  // for (int i = 0; i < folds.size(); ++i)
+  auto rows = qaim->rowCount();
+  for (int i = 0; i < rows; ++i)
+  {
+    const QModelIndex mi = qaim->index(i, 0);
+    foldBox->setCheckState(mi, Qt::Checked);
+  }
+}
+
+std::pair<QStringList, QStringList> QmitknnUNetToolGUI::ExtractTrainerPlannerFromString(QStringList trainerPlanners)
+{
+  QString splitterString = "__";
+  QStringList trainers, planners;
+  foreach (QString trainerPlanner, trainerPlanners)
+  {
+    trainers << trainerPlanner.split(splitterString, QString::SplitBehavior::SkipEmptyParts).first();
+    planners << trainerPlanner.split(splitterString, QString::SplitBehavior::SkipEmptyParts).last();
+  }
+  trainers.removeDuplicates();
+  planners.removeDuplicates();
+  std::pair<QStringList, QStringList> returnPair = {trainers, planners};
+  return returnPair;
+}
+
+std::vector<std::string> QmitknnUNetToolGUI::FetchSelectedFoldsFromUI(ctkCheckableComboBox *foldBox)
+{
+  std::vector<std::string> folds;
+  if (!(foldBox->allChecked() || foldBox->noneChecked()))
+  {
+    QModelIndexList foldList = foldBox->checkedIndexes();
+    foreach (QModelIndex index, foldList)
+    {
+      QString foldQString = foldBox->itemText(index.row()).split("_", QString::SplitBehavior::SkipEmptyParts).last();
+      folds.push_back(foldQString.toStdString());
+    }
+  }
+  return folds;
+}
diff --git a/Modules/SegmentationUI/Qmitk/QmitknnUNetToolGUI.h b/Modules/SegmentationUI/Qmitk/QmitknnUNetToolGUI.h
index 583151c47a..6828056fb1 100644
--- a/Modules/SegmentationUI/Qmitk/QmitknnUNetToolGUI.h
+++ b/Modules/SegmentationUI/Qmitk/QmitknnUNetToolGUI.h
@@ -1,222 +1,240 @@
 /*============================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center (DKFZ)
 All rights reserved.
 
 Use of this source code is governed by a 3-clause BSD license that can be
 found in the LICENSE file.s
 
 ============================================================================*/
 
 #ifndef QmitknnUNetToolGUI_h_Included
 #define QmitknnUNetToolGUI_h_Included
 
 #include "QmitkAutoMLSegmentationToolGUIBase.h"
 #include "QmitknnUNetFolderParser.h"
 #include "QmitknnUNetGPU.h"
 #include "mitknnUnetTool.h"
 #include "ui_QmitknnUNetToolGUIControls.h"
 #include <MitkSegmentationUIExports.h>
 #include <QMessageBox>
 #include <QmitkDataStorageComboBox.h>
 #include <QmitknnUNetEnsembleLayout.h>
 
 class MITKSEGMENTATIONUI_EXPORT QmitknnUNetToolGUI : public QmitkAutoMLSegmentationToolGUIBase
 {
   Q_OBJECT
 
 public:
   mitkClassMacro(QmitknnUNetToolGUI, QmitkAutoMLSegmentationToolGUIBase);
   itkFactorylessNewMacro(Self);
   itkCloneMacro(Self);
 
 protected slots:
 
   /**
    * @brief Qt slot
    *
    */
   void OnPreviewRequested();
 
   /**
    * @brief Qt slot
    *
    */
   void OnDirectoryChanged(const QString &);
 
   /**
    * @brief Qt slot
    *
    */
   void OnModelChanged(const QString &);
 
   /**
    * @brief Qt slot
    *
    */
   void OnTaskChanged(const QString &);
 
   /**
    * @brief Qt slot
    *
    */
   void OnTrainerChanged(const QString &);
 
   /**
    * @brief Qt slot
    *
    */
   void OnCheckBoxChanged(int);
 
   /**
    * @brief Qthread slot to capture failures from thread worker and
    * shows error message
    *
    */
   void SegmentationProcessFailed();
 
   /**
    * @brief Qthread to capture sucessfull nnUNet segmentation.
    * Further, renders the LabelSet image
    */
   void SegmentationResultHandler(mitk::nnUNetTool *);
 
   /**
    * @brief Qt Slot
    *
    */
   void OnModalitiesNumberChanged(int);
 
   /**
    * @brief Qt Slot
    *
    */
   void OnPythonPathChanged(const QString &);
 
   /**
    * @brief Qt Slot
    *
    */
   void OnModalPositionChanged(int);
 
   /**
    * @brief Qt slot
    *
    */
   void OnRefreshPresssed();
 
 protected:
   QmitknnUNetToolGUI();
   ~QmitknnUNetToolGUI() = default;
 
   void ConnectNewTool(mitk::AutoSegmentationWithPreviewTool *newTool) override;
   void InitializeUI(QBoxLayout *mainLayout) override;
   void EnableWidgets(bool enabled) override;
 
 private:
+  /**
+   * @brief Checks all the entries of the ctkCheckableComboBox ui widget.
+   * This feature is not present in ctkCheckableComboBox API.
+   */
+  void CheckAllInCheckableComboBox(ctkCheckableComboBox *);
+
+  /**
+   * @brief Parses the folder names containing trainer and planner together and,
+   * returns it as separate lists.
+   * @return std::pair<QStringList, QStringList>
+   */
+
+  std::pair<QStringList, QStringList> ExtractTrainerPlannerFromString(QStringList);
   /**
    * @brief Parses the ensemble UI elements and sets to nnUNetTool object pointer.
    *
    */
   void ProcessEnsembleModelsParams(mitk::nnUNetTool::Pointer);
 
   /**
    * @brief Parses the UI elements and sets to nnUNetTool object pointer.
    *
    */
   void ProcessModelParams(mitk::nnUNetTool::Pointer);
 
   /**
    * @brief Creates and renders QmitknnUNetTaskParamsUITemplate layout for ensemble input.
    */
   void ShowEnsembleLayout(bool visible = true);
 
   /**
    * @brief Creates a QMessage object and shows on screen.
    */
   void ShowErrorMessage(const std::string &, QMessageBox::Icon = QMessageBox::Critical);
 
+  /**
+   * @brief Shows any message on the tool pane.
+   */
+  void ShowStatusMessage(const QString &);
+
   /**
    * @brief Searches and parses paths of python virtual enviroments
    * from predefined lookout locations
    */
   void AutoParsePythonPaths();
 
   /**
    * @brief Check if pretrained model sub folder inside RESULTS FOLDER exist.
-   * 
+   *
    */
-  bool IsModelExists(const QString&, const QString&, const QString&);
+  bool IsModelExists(const QString &, const QString &, const QString &);
 
   /**
    * @brief Clears all combo boxes
    * Any new combo box added in the future can be featured here for clearance.
    *
    */
   void ClearAllComboBoxes();
 
   /**
    * @brief Checks if nnUNet_predict command is valid in the selected python virtual environment.
    *
    * @return bool
    */
   bool IsNNUNetInstalled(const QString &);
 
   /**
    * @brief Mapper function to map QString entries from UI to ModelParam attributes.
    *
    * @return mitk::ModelParams
    */
   mitk::ModelParams MapToRequest(
     const QString &, const QString &, const QString &, const QString &, const std::vector<std::string> &);
 
   /**
    * @brief Returns checked fold names from the ctk-Checkable-ComboBox.
    *
    * @return std::vector<std::string>
    */
-  std::vector<std::string> FetchSelectedFoldsFromUI();
+  std::vector<std::string> FetchSelectedFoldsFromUI(ctkCheckableComboBox *);
 
   /**
    * @brief Returns all paths from the dynamically generated ctk-path-line-edit boxes.
    *
    * @return std::vector<std::string>
    */
   std::vector<mitk::Image::ConstPointer> FetchMultiModalImagesFromUI();
 
   Ui_QmitknnUNetToolGUIControls m_Controls;
   QmitkGPULoader m_GpuLoader;
 
   /**
    * @brief Stores all dynamically added ctk-path-line-edit UI elements.
    *
    */
   std::vector<QmitkDataStorageComboBox *> m_Modalities;
 
   std::vector<std::unique_ptr<QmitknnUNetTaskParamsUITemplate>> m_EnsembleParams;
 
   mitk::NodePredicateBase::Pointer m_MultiModalPredicate;
 
   /**
    * @brief Stores row count of the "advancedSettingsLayout" layout element. This value helps dynamically add
    * ctk-path-line-edit UI elements at the right place. Forced to initialize in the InitializeUI method since there is
    * no guarantee of retrieving exact row count anywhere else.
    *
    */
   int m_UI_ROWS;
 
   /**
    * @brief Stores path of the model director (RESULTS_FOLDER appended by "nnUNet").
    *
    */
   std::shared_ptr<QmitknnUNetFolderParser> m_ParentFolder = nullptr;
 
   /**
    * @brief Valid list of models supported by nnUNet
    *
    */
   const QStringList m_VALID_MODELS = {"2d", "3d_lowres", "3d_fullres", "3d_cascade_fullres", "ensembles"};
 };
 #endif
diff --git a/Modules/SegmentationUI/Qmitk/QmitknnUNetToolGUIControls.ui b/Modules/SegmentationUI/Qmitk/QmitknnUNetToolGUIControls.ui
index 534b398ddf..5b019337ed 100644
--- a/Modules/SegmentationUI/Qmitk/QmitknnUNetToolGUIControls.ui
+++ b/Modules/SegmentationUI/Qmitk/QmitknnUNetToolGUIControls.ui
@@ -1,440 +1,460 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <ui version="4.0">
   <class>QmitknnUNetToolGUIControls</class>
   <widget class="QWidget" name="QmitknnUNetToolGUIControls">
     <property name="geometry">
       <rect>
         <x>0</x>
         <y>0</y>
         <width>192</width>
         <height>352</height>
       </rect>
     </property>
     <property name="sizePolicy">
       <sizepolicy hsizetype="Ignored" vsizetype="Minimum">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
       </sizepolicy>
     </property>
     <property name="minimumSize">
       <size>
         <width>100</width>
         <height>0</height>
       </size>
     </property>
     <property name="maximumSize">
       <size>
         <width>100000</width>
         <height>100000</height>
       </size>
     </property>
     <property name="windowTitle">
       <string>QmitknnUNetToolWidget</string>
     </property>
     <layout class="QVBoxLayout" name="verticalLayout">
       <property name="leftMargin">
         <number>0</number>
       </property>
       <property name="topMargin">
         <number>0</number>
       </property>
       <property name="rightMargin">
         <number>0</number>
       </property>
       <property name="bottomMargin">
         <number>0</number>
       </property>
       <item>
         <layout class="QGridLayout" name="advancedSettingsLayout">
           <item row="0" column="0">
             <widget class="QLabel" name="pretraineddirLabel">
               <property name="sizePolicy">
                 <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
                   <horstretch>0</horstretch>
                   <verstretch>0</verstretch>
                 </sizepolicy>
               </property>
               <property name="text">
                 <string>nnUNet Results Folder:</string>
               </property>
             </widget>
           </item>
           <item row="0" column="1" colspan="3">
             <widget class="ctkDirectoryButton" name="modeldirectoryBox" native="true" />
           </item>
           
           <!-- </item> -->
           <item row="1" column="1" colspan="3">
             <widget class="QPushButton" name="refreshdirectoryBox" native="false">
               <property name="text">
                 <string>Refresh Results Folder</string>
               </property>
             </widget>
           </item>
 
           <!-- </item> -->
           <item row="2" column="0">
             <widget class="QLabel" name="modelLabel">
               <property name="text">
                 <string>Configuration:</string>
               </property>
             </widget>
           </item>
           <item row="2" column="1">
             <widget class="ctkComboBox" name="modelBox" native="true" />
           </item>
           <item row="2" column="2">
             <widget class="QLabel" name="taskLabel">
               <property name="sizePolicy">
                 <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
                   <horstretch>0</horstretch>
                   <verstretch>0</verstretch>
                 </sizepolicy>
               </property>
               <property name="text">
                 <string>Task:</string>
               </property>
             </widget>
           </item>
           <item row="2" column="3">
             <widget class="ctkComboBox" name="taskBox" native="true" />
           </item>
 
           <!-- </item> -->
           <item row="3" column="0">
             <widget class="QLabel" name="trainerLabel">
               <property name="sizePolicy">
                 <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
                   <horstretch>0</horstretch>
                   <verstretch>0</verstretch>
                 </sizepolicy>
               </property>
               <property name="text">
                 <string>Trainer:</string>
               </property>
             </widget>
           </item>
           <item row="3" column="1">
             <widget class="ctkComboBox" name="trainerBox" native="true" />
           </item>
 
           <item row="3" column="2">
             <widget class="QLabel" name="plannerLabel">
               <property name="sizePolicy">
                 <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
                   <horstretch>0</horstretch>
                   <verstretch>0</verstretch>
                 </sizepolicy>
               </property>
               <property name="text">
                 <string>Plan:</string>
               </property>
             </widget>
           </item>
           <item row="3" column="3">
             <widget class="ctkComboBox" name="plannerBox" native="true" />
           </item>
           <!-- </item> -->
           <item row="4" column="0">
             <widget class="QLabel" name="foldLabel">
               <property name="text">
                 <string>Fold:</string>
               </property>
             </widget>
           </item>
           <item row="4" column="1">
             <widget class="ctkCheckableComboBox" name="foldBox" native="true" />
           </item>
           <item row="4" column="3">
             <widget class="QPushButton" name="stopButton" native="false">
               <property name="text">
                 <string>Stop</string>
               </property>
             </widget>
           </item>
           <!-- </item> -->
           <item row="5" column="0">
             <widget class="QLabel" name="multiModalLabel">
               <property name="sizePolicy">
                 <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
                   <horstretch>0</horstretch>
                   <verstretch>0</verstretch>
                 </sizepolicy>
               </property>
               <property name="text">
                 <string>Multi-Modal:</string>
               </property>
             </widget>
           </item>
           <item row="5" column="1">
             <widget class="ctkCheckBox" name="multiModalBox" native="true" />
           </item>
           <item row="5" column="2">
             <widget class="QLabel" name="multiModalSpinLabel">
               <property name="sizePolicy">
                 <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
                   <horstretch>0</horstretch>
                   <verstretch>0</verstretch>
                 </sizepolicy>
               </property>
               <property name="text">
                 <string>No. of Extra Modalities:</string>
               </property>
             </widget>
           </item>
           <item row="5" column="3">
             <widget class="QSpinBox" name="multiModalSpinBox" native="true" />
           </item>
 
           <!-- </item> -->
           <item row="6" column="2">
             <widget class="QLabel" name="posSpinBoxLabel">
               <property name="sizePolicy">
                 <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
                   <horstretch>0</horstretch>
                   <verstretch>0</verstretch>
                 </sizepolicy>
               </property>
               <property name="text">
                 <string>Reference Image Position</string>
               </property>
             </widget>
           </item>
           <item row="6" column="3">
             <widget class="QSpinBox" name="posSpinBox" native="true" />
           </item>
           <!-- </item> -->
         </layout>
       </item>
 
       <!-- start advanced-->
       <item>
         <widget class="ctkCollapsibleGroupBox" name="inputGroupBox" native="true">
           <property name="minimumSize">
             <size>
               <width>0</width>
               <height>0</height>
             </size>
           </property>
           <property name="collapsedHeight">
             <number>5</number>
           </property>
           <property name="title">
             <string>Advanced</string>
           </property>
           <property name="collapsed">
             <bool>true</bool>
           </property>
           <property name="flat">
             <bool>true</bool>
           </property>
           <property name="alignment">
             <set>Qt::AlignRight</set>
           </property>
           <layout class="QVBoxLayout" name="verticalLayout_4">
             <!--  <property name="leftMargin">
               <number>0</number>
               </property>
               <property name="topMargin">
                 <number>0</number>
               </property>
               <property name="rightMargin">
                 <number>0</number>
               </property>
               <property name="bottomMargin">
                 <number>0</number>
               </property>-->
             <item>
               <layout class="QGridLayout" name="_2">
                 <property name="spacing">
                   <number>6</number>
                 </property>
                 <property name="margin">
                   <number>0</number>
                 </property>
 
                 <item row="0" column="0">
                   <widget class="QLabel" name="nopipLabel">
                     <property name="sizePolicy">
                       <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
                         <horstretch>0</horstretch>
                         <verstretch>0</verstretch>
                       </sizepolicy>
                     </property>
                     <property name="text">
                       <string>No Pip</string>
                     </property>
                   </widget>
                 </item>
                 <item row="0" column="1">
                   <widget class="ctkCheckBox" name="nopipBox" native="true" />
                 </item>
                 <item row="0" column="2">
                   <widget class="QLabel" name="mixedPrecisionLabel">
                     <property name="sizePolicy">
                       <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
                         <horstretch>0</horstretch>
                         <verstretch>0</verstretch>
                       </sizepolicy>
                     </property>
                     <property name="text">
                       <string>Mixed Precision</string>
                     </property>
                   </widget>
                 </item>
                 <item row="0" column="3">
                   <widget class="QCheckBox" name="mixedPrecisionBox" native="true">
                     <property name="checked">
                       <bool>true</bool>
                     </property>
                   </widget>
                 </item>
                 <!-- </item> -->
                 <item row="1" column="0">
                   <widget class="QLabel" name="gpuSpinLabel">
                     <property name="sizePolicy">
                       <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
                         <horstretch>0</horstretch>
                         <verstretch>0</verstretch>
                       </sizepolicy>
                     </property>
                     <property name="text">
                       <string>GPU Id:</string>
                     </property>
                   </widget>
                 </item>
                 <item row="1" column="1">
                   <widget class="QSpinBox" name="gpuSpinBox" native="true" />
                 </item>
 
                 <item row="1" column="2">
                   <widget class="QLabel" name="mirrorLabel">
                     <property name="sizePolicy">
                       <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
                         <horstretch>0</horstretch>
                         <verstretch>0</verstretch>
                       </sizepolicy>
                     </property>
                     <property name="text">
                       <string>Enable Mirroring</string>
                     </property>
                   </widget>
                 </item>
                 <item row="1" column="3">
                   <widget class="ctkCheckBox" name="mirrorBox" native="true">
                     <property name="checked">
                       <bool>true</bool>
                     </property>
                   </widget>
                 </item>
                 <!-- </item> -->
                 <item row="2" column="0">
                   <widget class="QLabel" name="pythonEnvLabel">
                     <property name="sizePolicy">
                       <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
                         <horstretch>0</horstretch>
                         <verstretch>0</verstretch>
                       </sizepolicy>
                     </property>
                     <property name="text">
                       <string>Python Path:</string>
                     </property>
                   </widget>
                 </item>
                 <item row="2" column="1" colspan="3">
                   <widget class="ctkComboBox" name="pythonEnvComboBox" native="true" />
                 </item>
                 <!-- </item> -->
                 <item row="3" column="0">
                   <widget class="QLabel" name="nnUnetdirLabel">
                     <property name="sizePolicy">
                       <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
                         <horstretch>0</horstretch>
                         <verstretch>0</verstretch>
                       </sizepolicy>
                     </property>
                     <property name="text">
                       <string>nnUNet Path:</string>
                     </property>
                   </widget>
                 </item>
                 <item row="3" column="1" colspan="3">
                   <widget class="ctkDirectoryButton" name="codedirectoryBox" native="true" />
                 </item>
                 <!-- </item> -->
+                <item row="4" column="0">
+                  <widget class="QLabel" name="postProcessingLabel">
+                    <property name="sizePolicy">
+                      <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+                        <horstretch>0</horstretch>
+                        <verstretch>0</verstretch>
+                      </sizepolicy>
+                    </property>
+                    <property name="text">
+                      <string>Use Postprocessing JSON</string>
+                    </property>
+                  </widget>
+                </item>
+                <item row="4" column="1">
+                  <widget class="ctkCheckBox" name="postProcessingCheckBox" native="true">
+                    <property name="checked">
+                      <bool>true</bool>
+                    </property>
+                  </widget>
+                </item>
 
               </layout>
             </item>
           </layout>
         </widget>
       </item>
       <!-- end advanced-->
 
       <item>
         <widget class="QPushButton" name="previewButton">
           <property name="sizePolicy">
             <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
               <horstretch>0</horstretch>
               <verstretch>0</verstretch>
             </sizepolicy>
           </property>
           <property name="maximumSize">
             <size>
               <width>100000</width>
               <height>16777215</height>
             </size>
           </property>
           <property name="text">
             <string>Preview</string>
           </property>
         </widget>
       </item>
       <item>
         <widget class="QLabel" name="statusLabel">
           <property name="sizePolicy">
             <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
               <horstretch>0</horstretch>
               <verstretch>0</verstretch>
             </sizepolicy>
           </property>
         </widget>
       </item>
 
     </layout>
   </widget>
 
   <customwidgets>
     <customwidget>
       <class>ctkDirectoryButton</class>
       <extends>QWidget</extends>
       <header location="global">ctkDirectoryButton.h</header>
       <container>1</container>
     </customwidget>
     <customwidget>
       <class>ctkComboBox</class>
       <extends>QComboBox</extends>
       <header location="global">ctkComboBox.h</header>
       <container>1</container>
     </customwidget>
     <customwidget>
       <class>ctkCheckableComboBox</class>
       <extends>QComboBox</extends>
       <header location="global">ctkCheckableComboBox.h</header>
       <container>1</container>
     </customwidget>
     <customwidget>
       <class>ctkCheckBox</class>
       <extends>QCheckBox</extends>
       <header location="global">ctkCheckBox.h</header>
       <container>1</container>
     </customwidget>
     <customwidget>
       <class>ctkCollapsibleGroupBox</class>
       <extends>QGroupBox</extends>
       <header location="global">ctkCollapsibleGroupBox.h</header>
       <container>1</container>
     </customwidget>
   </customwidgets>
   <resources />
   <connections />
 </ui>
diff --git a/Modules/SegmentationUI/Qmitk/QmitknnUNetToolSlots.cpp b/Modules/SegmentationUI/Qmitk/QmitknnUNetToolSlots.cpp
index b04034d042..a4085daeee 100644
--- a/Modules/SegmentationUI/Qmitk/QmitknnUNetToolSlots.cpp
+++ b/Modules/SegmentationUI/Qmitk/QmitknnUNetToolSlots.cpp
@@ -1,434 +1,443 @@
 #include "QmitknnUNetToolGUI.h"
 #include <QDir>
 #include <QDirIterator>
 #include <QmitknnUNetEnsembleLayout.h>
 #include <algorithm>
 #include <ctkCollapsibleGroupBox.h>
 
 void QmitknnUNetToolGUI::EnableWidgets(bool enabled)
 {
   Superclass::EnableWidgets(enabled);
 }
 
 void QmitknnUNetToolGUI::ClearAllComboBoxes()
 {
   m_Controls.modelBox->clear();
   m_Controls.taskBox->clear();
   m_Controls.foldBox->clear();
   m_Controls.trainerBox->clear();
   for (std::unique_ptr<QmitknnUNetTaskParamsUITemplate> &layout : m_EnsembleParams)
   {
     layout->modelBox->clear();
     layout->trainerBox->clear();
     layout->plannerBox->clear();
+    layout->foldBox->clear();
   }
 }
 
 void QmitknnUNetToolGUI::OnRefreshPresssed()
 {
   const QString resultsFolder = m_Controls.modeldirectoryBox->directory();
   OnDirectoryChanged(resultsFolder);
 }
 
 void QmitknnUNetToolGUI::OnDirectoryChanged(const QString &resultsFolder)
 {
   m_Controls.previewButton->setEnabled(false);
   this->ClearAllComboBoxes();
   m_ParentFolder = std::make_shared<QmitknnUNetFolderParser>(resultsFolder);
   auto models = m_ParentFolder->getModelNames<QStringList>();
   std::for_each(models.begin(),
                 models.end(),
                 [this](QString model)
                 {
                   if (m_VALID_MODELS.contains(model, Qt::CaseInsensitive))
                     m_Controls.modelBox->addItem(model);
                 });
 }
 
 void QmitknnUNetToolGUI::OnModelChanged(const QString &model)
 {
   if (model.isEmpty())
   {
     return;
   }
-  m_Controls.taskBox->clear();
-  auto tasks = m_ParentFolder->getTasksForModel<QStringList>(model);
-  std::for_each(tasks.begin(), tasks.end(), [this](QString task) { m_Controls.taskBox->addItem(task); });
+  ctkComboBox *box = qobject_cast<ctkComboBox *>(sender());
+  if (box == m_Controls.modelBox)
+  {
+    m_Controls.taskBox->clear();
+    auto tasks = m_ParentFolder->getTasksForModel<QStringList>(model);
+    std::for_each(tasks.begin(), tasks.end(), [this](QString task) { m_Controls.taskBox->addItem(task); });
+  }
+  else if (!m_EnsembleParams.empty())
+  {
+    for (std::unique_ptr<QmitknnUNetTaskParamsUITemplate> &layout : m_EnsembleParams)
+    {
+      if (box == layout->modelBox)
+      {
+        layout->trainerBox->clear();
+        layout->plannerBox->clear();
+        QStringList trainerPlanners =
+          m_ParentFolder->getTrainerPlannersForTask<QStringList>(m_Controls.taskBox->currentText(), model);
+        QStringList trainers, planners;
+        std::tie(trainers, planners) = ExtractTrainerPlannerFromString(trainerPlanners);
+
+        std::for_each(
+          trainers.begin(), trainers.end(), [&layout](QString trainer) { layout->trainerBox->addItem(trainer); });
+        std::for_each(
+          planners.begin(), planners.end(), [&layout](QString planner) { layout->plannerBox->addItem(planner); });
+        break;
+      }
+    }
+  }
 }
 
 void QmitknnUNetToolGUI::OnTaskChanged(const QString &task)
 {
   if (task.isEmpty())
   {
     return;
   }
   m_Controls.trainerBox->clear();
   m_Controls.plannerBox->clear();
-  QStringList trainerPlanners =
-    m_ParentFolder->getTrainerPlannersForTask<QStringList>(task, m_Controls.modelBox->currentText());
-  if (m_Controls.modelBox->currentText() == "ensembles")
+  if (m_Controls.modelBox->currentText() == m_VALID_MODELS.last())
   {
     m_Controls.trainerBox->setVisible(false);
     m_Controls.trainerLabel->setVisible(false);
     m_Controls.plannerBox->setVisible(false);
     m_Controls.plannerLabel->setVisible(false);
     m_Controls.foldBox->setVisible(false);
     m_Controls.foldLabel->setVisible(false);
     ShowEnsembleLayout(true);
-    QString splitterString = "--";
-    QStringList models, trainers, planners;
-    foreach (QString trainerPlanner, trainerPlanners)
-    {
-      QStringList trainerSplitParts = trainerPlanner.split(splitterString, QString::SplitBehavior::SkipEmptyParts);
-      foreach (QString modelSet, trainerSplitParts)
-      {
-        modelSet.remove("ensemble_", Qt::CaseInsensitive);
-        QStringList splitParts = modelSet.split("__", QString::SplitBehavior::SkipEmptyParts);
-        QString modelName = splitParts.first();
-        QString trainer = splitParts.at(1);
-        QString planId = splitParts.at(2);
-        models << modelName;
-        trainers << trainer;
-        planners << planId;
-      }
-    }
-    trainers.removeDuplicates();
-    planners.removeDuplicates();
+    QStringList models = m_ParentFolder->getModelsForTask<QStringList>(m_Controls.taskBox->currentText());
     models.removeDuplicates();
+    models.removeOne(m_VALID_MODELS.last());
 
     for (std::unique_ptr<QmitknnUNetTaskParamsUITemplate> &layout : m_EnsembleParams)
     {
       layout->modelBox->clear();
       layout->trainerBox->clear();
       layout->plannerBox->clear();
       std::for_each(models.begin(),
                     models.end(),
                     [&layout, this](QString model)
                     {
                       if (m_VALID_MODELS.contains(model, Qt::CaseInsensitive))
                         layout->modelBox->addItem(model);
                     });
-      std::for_each(
-        trainers.begin(), trainers.end(), [&layout](QString trainer) { layout->trainerBox->addItem(trainer); });
-      std::for_each(
-        planners.begin(), planners.end(), [&layout](QString planner) { layout->plannerBox->addItem(planner); });
     }
     m_Controls.previewButton->setEnabled(true);
   }
   else
   {
     m_Controls.trainerBox->setVisible(true);
     m_Controls.trainerLabel->setVisible(true);
     m_Controls.plannerBox->setVisible(true);
     m_Controls.plannerLabel->setVisible(true);
     m_Controls.foldBox->setVisible(true);
     m_Controls.foldLabel->setVisible(true);
     m_Controls.previewButton->setEnabled(false);
     ShowEnsembleLayout(false);
-    QString splitterString = "__";
+    QStringList trainerPlanners =
+      m_ParentFolder->getTrainerPlannersForTask<QStringList>(task, m_Controls.modelBox->currentText());
     QStringList trainers, planners;
-    foreach (QString trainerPlanner, trainerPlanners)
-    {
-      trainers << trainerPlanner.split(splitterString, QString::SplitBehavior::SkipEmptyParts).first();
-      planners << trainerPlanner.split(splitterString, QString::SplitBehavior::SkipEmptyParts).last();
-    }
-    trainers.removeDuplicates();
-    planners.removeDuplicates();
+    std::tie(trainers, planners) = ExtractTrainerPlannerFromString(trainerPlanners);
     std::for_each(
       trainers.begin(), trainers.end(), [this](QString trainer) { m_Controls.trainerBox->addItem(trainer); });
     std::for_each(
       planners.begin(), planners.end(), [this](QString planner) { m_Controls.plannerBox->addItem(planner); });
   }
 }
 
 void QmitknnUNetToolGUI::OnTrainerChanged(const QString &plannerSelected)
 {
   if (plannerSelected.isEmpty())
   {
     return;
   }
-  m_Controls.foldBox->clear();
-  if (m_Controls.modelBox->currentText() != "ensembles")
+  ctkComboBox *box = qobject_cast<ctkComboBox *>(sender());
+  if (box == m_Controls.plannerBox)
   {
+    m_Controls.foldBox->clear();
     auto selectedTrainer = m_Controls.trainerBox->currentText();
     auto selectedTask = m_Controls.taskBox->currentText();
     auto selectedModel = m_Controls.modelBox->currentText();
     auto folds = m_ParentFolder->getFoldsForTrainerPlanner<QStringList>(
       selectedTrainer, plannerSelected, selectedTask, selectedModel);
     std::for_each(folds.begin(),
                   folds.end(),
                   [this](QString fold)
                   {
                     if (fold.startsWith("fold_", Qt::CaseInsensitive)) // imposed by nnUNet
                       m_Controls.foldBox->addItem(fold);
                   });
     if (m_Controls.foldBox->count() != 0)
     {
-      // Now recalling all added items to check-mark it.
-      const QAbstractItemModel *qaim = m_Controls.foldBox->checkableModel();
-      for (int i = 0; i < folds.size(); ++i)
-      {
-        const QModelIndex mi = qaim->index(i, 0);
-        m_Controls.foldBox->setCheckState(mi, Qt::Checked);
-      }
+      CheckAllInCheckableComboBox(m_Controls.foldBox);
       m_Controls.previewButton->setEnabled(true);
     }
   }
-  else
+  else if (!m_EnsembleParams.empty())
   {
-    m_Controls.previewButton->setEnabled(true);
+    for (std::unique_ptr<QmitknnUNetTaskParamsUITemplate> &layout : m_EnsembleParams)
+    {
+      if (box == layout->plannerBox)
+      {
+        layout->foldBox->clear();
+        auto selectedTrainer = layout->trainerBox->currentText();
+        auto selectedTask = m_Controls.taskBox->currentText();
+        auto selectedModel = layout->modelBox->currentText();
+        auto folds = m_ParentFolder->getFoldsForTrainerPlanner<QStringList>(
+          selectedTrainer, plannerSelected, selectedTask, selectedModel);
+        std::for_each(folds.begin(),
+                      folds.end(),
+                      [&layout](QString fold)
+                      {
+                        if (fold.startsWith("fold_", Qt::CaseInsensitive)) // imposed by nnUNet
+                          layout->foldBox->addItem(fold);
+                      });
+        if (layout->foldBox->count() != 0)
+        {
+          CheckAllInCheckableComboBox(layout->foldBox);
+          m_Controls.previewButton->setEnabled(true);
+        }
+        break;
+      }
+    }
   }
 }
 
 void QmitknnUNetToolGUI::OnPythonPathChanged(const QString &pyEnv)
 {
   if (pyEnv == QString("Select"))
   {
     QString path =
       QFileDialog::getExistingDirectory(m_Controls.pythonEnvComboBox->parentWidget(), "Python Path", "dir");
     if (!path.isEmpty())
     {
       m_Controls.pythonEnvComboBox->insertItem(0, path);
       m_Controls.pythonEnvComboBox->setCurrentIndex(0);
     }
   }
   else if (!IsNNUNetInstalled(pyEnv))
   {
     std::string warning =
       "WARNING: nnUNet is not detected on the Python environment you selected. Please select another "
       "environment or create one. For more info refer https://github.com/MIC-DKFZ/nnUNet";
     ShowErrorMessage(warning);
   }
 }
 
 void QmitknnUNetToolGUI::OnCheckBoxChanged(int state)
 {
   bool visibility = false;
   if (state == Qt::Checked)
   {
     visibility = true;
   }
   ctkCheckBox *box = qobject_cast<ctkCheckBox *>(sender());
   if (box != nullptr)
   {
     if (box->objectName() == QString("nopipBox"))
     {
       m_Controls.codedirectoryBox->setVisible(visibility);
       m_Controls.nnUnetdirLabel->setVisible(visibility);
     }
     else if (box->objectName() == QString("multiModalBox"))
     {
       m_Controls.multiModalSpinLabel->setVisible(visibility);
       m_Controls.multiModalSpinBox->setVisible(visibility);
       m_Controls.posSpinBoxLabel->setVisible(visibility);
       m_Controls.posSpinBox->setVisible(visibility);
       if (visibility)
       {
         QmitkDataStorageComboBox *defaultImage = new QmitkDataStorageComboBox(this, true);
         defaultImage->setObjectName(QString("multiModal_" + QString::number(0)));
         defaultImage->SetPredicate(this->m_MultiModalPredicate);
         defaultImage->setDisabled(true);
         mitk::nnUNetTool::Pointer tool = this->GetConnectedToolAs<mitk::nnUNetTool>();
         if (tool != nullptr)
         {
           defaultImage->SetDataStorage(tool->GetDataStorage());
           defaultImage->SetSelectedNode(tool->GetRefNode());
         }
         m_Controls.advancedSettingsLayout->addWidget(defaultImage, this->m_UI_ROWS + m_Modalities.size() + 1, 1, 1, 3);
         m_Modalities.push_back(defaultImage);
         m_Controls.posSpinBox->setMaximum(this->m_Modalities.size() - 1);
         m_UI_ROWS++;
       }
       else
       {
         OnModalitiesNumberChanged(0);
         m_Controls.multiModalSpinBox->setValue(0);
         m_Controls.posSpinBox->setMaximum(0);
         delete this->m_Modalities[0];
         m_Modalities.pop_back();
       }
     }
   }
 }
 
 void QmitknnUNetToolGUI::OnModalitiesNumberChanged(int num)
 {
   while (num > static_cast<int>(this->m_Modalities.size() - 1))
   {
     QmitkDataStorageComboBox *multiModalBox = new QmitkDataStorageComboBox(this, true);
     mitk::nnUNetTool::Pointer tool = this->GetConnectedToolAs<mitk::nnUNetTool>();
     multiModalBox->SetDataStorage(tool->GetDataStorage());
     multiModalBox->SetPredicate(this->m_MultiModalPredicate);
     multiModalBox->setObjectName(QString("multiModal_" + QString::number(m_Modalities.size() + 1)));
     m_Controls.advancedSettingsLayout->addWidget(multiModalBox, this->m_UI_ROWS + m_Modalities.size() + 1, 1, 1, 3);
     m_Modalities.push_back(multiModalBox);
   }
   while (num < static_cast<int>(this->m_Modalities.size() - 1) && !m_Modalities.empty())
   {
     QmitkDataStorageComboBox *child = m_Modalities.back();
     if (child->objectName() == "multiModal_0")
     {
       std::iter_swap(this->m_Modalities.end() - 2, this->m_Modalities.end() - 1);
       child = m_Modalities.back();
     }
     delete child; // delete the layout item
     m_Modalities.pop_back();
   }
   m_Controls.posSpinBox->setMaximum(this->m_Modalities.size() - 1);
   m_Controls.advancedSettingsLayout->update();
 }
 
 void QmitknnUNetToolGUI::OnModalPositionChanged(int posIdx)
 {
   if (posIdx < static_cast<int>(m_Modalities.size()))
   {
     int currPos = 0;
     bool stopCheck = false;
     // for-loop clears all widgets from the QGridLayout and also, finds the position of loaded-image widget.
     for (QmitkDataStorageComboBox *multiModalBox : m_Modalities)
     {
       m_Controls.advancedSettingsLayout->removeWidget(multiModalBox);
       multiModalBox->setParent(nullptr);
       if (multiModalBox->objectName() != "multiModal_0" && !stopCheck)
       {
         currPos++;
       }
       else
       {
         stopCheck = true;
       }
     }
     // moving the loaded-image widget to the required position
     std::iter_swap(this->m_Modalities.begin() + currPos, m_Modalities.begin() + posIdx);
     // re-adding all widgets in the order
     for (int i = 0; i < static_cast<int>(m_Modalities.size()); ++i)
     {
       QmitkDataStorageComboBox *multiModalBox = m_Modalities[i];
       m_Controls.advancedSettingsLayout->addWidget(multiModalBox, m_UI_ROWS + i + 1, 1, 1, 3);
     }
     m_Controls.advancedSettingsLayout->update();
   }
 }
 
 void QmitknnUNetToolGUI::AutoParsePythonPaths()
 {
   QString homeDir = QDir::homePath();
   std::vector<QString> searchDirs;
 #ifdef _WIN32
   searchDirs.push_back(QString("C:") + QDir::separator() + QString("ProgramData") + QDir::separator() +
                        QString("anaconda3"));
 #else
   // Add search locations for possible standard python paths here
   searchDirs.push_back(homeDir + QDir::separator() + "environments");
   searchDirs.push_back(homeDir + QDir::separator() + "anaconda3");
   searchDirs.push_back(homeDir + QDir::separator() + "miniconda3");
   searchDirs.push_back(homeDir + QDir::separator() + "opt" + QDir::separator() + "miniconda3");
   searchDirs.push_back(homeDir + QDir::separator() + "opt" + QDir::separator() + "anaconda3");
 #endif
   for (QString searchDir : searchDirs)
   {
     if (searchDir.endsWith("anaconda3", Qt::CaseInsensitive))
     {
       if (QDir(searchDir).exists())
       {
         m_Controls.pythonEnvComboBox->insertItem(0, "(base): " + searchDir);
         searchDir.append((QDir::separator() + QString("envs")));
       }
     }
     for (QDirIterator subIt(searchDir, QDir::AllDirs, QDirIterator::NoIteratorFlags); subIt.hasNext();)
     {
       subIt.next();
       QString envName = subIt.fileName();
       if (!envName.startsWith('.')) // Filter out irrelevent hidden folders, if any.
       {
         m_Controls.pythonEnvComboBox->insertItem(0, "(" + envName + "): " + subIt.filePath());
       }
     }
   }
   m_Controls.pythonEnvComboBox->setCurrentIndex(-1);
 }
 
-std::vector<std::string> QmitknnUNetToolGUI::FetchSelectedFoldsFromUI()
-{
-  std::vector<std::string> folds;
-  if (!(m_Controls.foldBox->allChecked() || m_Controls.foldBox->noneChecked()))
-  {
-    QModelIndexList foldList = m_Controls.foldBox->checkedIndexes();
-    foreach (QModelIndex index, foldList)
-    {
-      QString foldQString =
-        m_Controls.foldBox->itemText(index.row()).split("_", QString::SplitBehavior::SkipEmptyParts).last();
-      folds.push_back(foldQString.toStdString());
-    }
-  }
-  return folds;
-}
-
 mitk::ModelParams QmitknnUNetToolGUI::MapToRequest(const QString &modelName,
                                                    const QString &taskName,
                                                    const QString &trainer,
                                                    const QString &planId,
                                                    const std::vector<std::string> &folds)
 {
   mitk::ModelParams requestObject;
   requestObject.model = modelName.toStdString();
   requestObject.trainer = trainer.toStdString();
   requestObject.planId = planId.toStdString();
   requestObject.task = taskName.toStdString();
   requestObject.folds = folds;
   return requestObject;
 }
 
 void QmitknnUNetToolGUI::SegmentationProcessFailed()
 {
   m_Controls.statusLabel->setText(
     "<b>STATUS: </b><i>Error in the segmentation process. No resulting segmentation can be loaded.</i>");
   this->setCursor(Qt::ArrowCursor);
   std::stringstream stream;
   stream << "Error in the segmentation process. No resulting segmentation can be loaded.";
   ShowErrorMessage(stream.str());
   m_Controls.stopButton->setEnabled(false);
 }
 
 void QmitknnUNetToolGUI::SegmentationResultHandler(mitk::nnUNetTool *tool)
 {
   tool->RenderOutputBuffer();
   this->SetLabelSetPreview(tool->GetMLPreview());
   m_Controls.statusLabel->setText("<b>STATUS: </b><i>Segmentation task finished successfully. Please Confirm the "
                                   "segmentation else will result in data loss</i>");
   m_Controls.stopButton->setEnabled(false);
 }
 
 void QmitknnUNetToolGUI::ShowEnsembleLayout(bool visible)
 {
   if (m_EnsembleParams.empty())
   {
     ctkCollapsibleGroupBox *groupBoxModel1 = new ctkCollapsibleGroupBox(this);
     auto lay1 = std::make_unique<QmitknnUNetTaskParamsUITemplate>(groupBoxModel1);
-    m_EnsembleParams.push_back(std::move(lay1));
     groupBoxModel1->setObjectName(QString::fromUtf8("model_1_Box"));
     groupBoxModel1->setTitle(QString::fromUtf8("Model 1"));
     groupBoxModel1->setMinimumSize(QSize(0, 0));
     groupBoxModel1->setCollapsedHeight(5);
     groupBoxModel1->setCollapsed(false);
     groupBoxModel1->setFlat(true);
     groupBoxModel1->setAlignment(Qt::AlignRight);
     m_Controls.advancedSettingsLayout->addWidget(groupBoxModel1, 3, 0, 1, 2);
 
+    connect(lay1->modelBox, SIGNAL(currentTextChanged(const QString &)), this, SLOT(OnModelChanged(const QString &)));
+    connect(
+      lay1->plannerBox, SIGNAL(currentTextChanged(const QString &)), this, SLOT(OnTrainerChanged(const QString &)));
+    m_EnsembleParams.push_back(std::move(lay1));
+
     ctkCollapsibleGroupBox *groupBoxModel2 = new ctkCollapsibleGroupBox(this);
     auto lay2 = std::make_unique<QmitknnUNetTaskParamsUITemplate>(groupBoxModel2);
-    m_EnsembleParams.push_back(std::move(lay2));
     groupBoxModel2->setObjectName(QString::fromUtf8("model_2_Box"));
     groupBoxModel2->setTitle(QString::fromUtf8("Model 2"));
     groupBoxModel2->setMinimumSize(QSize(0, 0));
     groupBoxModel2->setCollapsedHeight(5);
     groupBoxModel2->setCollapsed(false);
     groupBoxModel2->setFlat(true);
     groupBoxModel2->setAlignment(Qt::AlignLeft);
     m_Controls.advancedSettingsLayout->addWidget(groupBoxModel2, 3, 2, 1, 2);
+
+    connect(lay2->modelBox, SIGNAL(currentTextChanged(const QString &)), this, SLOT(OnModelChanged(const QString &)));
+    connect(
+      lay2->plannerBox, SIGNAL(currentTextChanged(const QString &)), this, SLOT(OnTrainerChanged(const QString &)));
+    m_EnsembleParams.push_back(std::move(lay2));
   }
   for (std::unique_ptr<QmitknnUNetTaskParamsUITemplate> &layout : m_EnsembleParams)
   {
-    layout->parent->setVisible(visible);
+    layout->setVisible(visible);
   }
 }