diff --git a/Modules/Segmentation/Interactions/mitknnUnetTool.cpp b/Modules/Segmentation/Interactions/mitknnUnetTool.cpp
index 745f135fb4..25b86e6778 100644
--- a/Modules/Segmentation/Interactions/mitknnUnetTool.cpp
+++ b/Modules/Segmentation/Interactions/mitknnUnetTool.cpp
@@ -1,328 +1,333 @@
 /*============================================================================
 
 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 <cstdlib>
 #include <fstream>
 #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();
 }
 
 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*/)
 {
   //Image::Pointer _inputAtTimeStep = inputAtTimeStep->Clone();
   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())
     {
       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";
         IOUtil::Save(modalImage.GetPointer(), outModalFile);
         /* std::ifstream src(inModalFile, std::ios::binary);
         std::ofstream dst(outModalFile, std::ios::binary);
         dst << src.rdbuf();
         dst.close();
         src.close();*/
       }
     }
   }
   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("--all_in_gpu");
     // args.push_back(this->GetAllInGPU() ? std::string("True") : std::string("False"));
 
     // args.push_back("--num_threads_preprocessing");
     // args.push_back(std::to_string(this->GetPreprocessingThreads()));
 
     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())
     {
       args.push_back("--save_npz");
     }
 
     try
     {
       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());
 
     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());
 
     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/Segmentation/Interactions/mitknnUnetTool.h b/Modules/Segmentation/Interactions/mitknnUnetTool.h
index b360e98d00..8abf4be337 100644
--- a/Modules/Segmentation/Interactions/mitknnUnetTool.h
+++ b/Modules/Segmentation/Interactions/mitknnUnetTool.h
@@ -1,197 +1,198 @@
 /*============================================================================
 
 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.
 
 ============================================================================*/
 
 #ifndef mitknnUnetTool_h_Included
 #define mitknnUnetTool_h_Included
 
 #include "mitkAutoMLSegmentationWithPreviewTool.h"
 #include "mitkCommon.h"
 #include "mitkToolManager.h"
 #include <MitkSegmentationExports.h>
 #include <mitkStandardFileLocations.h>
 
 namespace us
 {
   class ModuleResource;
 }
 
 namespace mitk
 {
   /**
    * @brief nnUNet parameter request object holding all model parameters for input.
    * Also holds output temporary directory path.
    */
   struct ModelParams
   {
     std::string task;
     std::vector<std::string> folds;
     std::string model;
     std::string trainer;
     std::string planId;
     std::string outputDir; 
   };
 
   /**
     \brief nnUNet segmentation tool.
 
     \ingroup Interaction
     \ingroup ToolManagerEtAl
 
     \warning Only to be instantiated by mitk::ToolManager.
   */
   class MITKSEGMENTATION_EXPORT nnUNetTool : public AutoMLSegmentationWithPreviewTool
   {
   public:
     mitkClassMacro(nnUNetTool, AutoMLSegmentationWithPreviewTool);
     itkFactorylessNewMacro(Self);
     itkCloneMacro(Self);
 
     const char **GetXPM() const override;
     const char *GetName() const override;
     us::ModuleResource GetIconResource() const override;
 
     void Activated() override;
 
     itkSetMacro(nnUNetDirectory, std::string);
     itkGetConstMacro(nnUNetDirectory, std::string);
 
     itkSetMacro(ModelDirectory, std::string);
     itkGetConstMacro(ModelDirectory, std::string);
 
     itkSetMacro(PythonPath, std::string);
     itkGetConstMacro(PythonPath, std::string);
 
     itkSetMacro(MitkTempDir, std::string);
     itkGetConstMacro(MitkTempDir, std::string);
 
     itkSetMacro(PostProcessingJsonDirectory, std::string);
     itkGetConstMacro(PostProcessingJsonDirectory, std::string);
     /*
     itkSetMacro(UseGPU, bool);
     itkGetConstMacro(UseGPU, bool);
     itkBooleanMacro(UseGPU);
 
     itkSetMacro(AllInGPU, bool);
     itkGetConstMacro(AllInGPU, bool);
     itkBooleanMacro(AllInGPU);
     */
     itkSetMacro(MixedPrecision, bool);
     itkGetConstMacro(MixedPrecision, bool);
     itkBooleanMacro(MixedPrecision);
 
     itkSetMacro(Mirror, bool);
     itkGetConstMacro(Mirror, bool);
     itkBooleanMacro(Mirror);
 
     itkSetMacro(MultiModal, bool);
     itkGetConstMacro(MultiModal, bool);
     itkBooleanMacro(MultiModal);
 
     itkSetMacro(NoPip, bool);
     itkGetConstMacro(NoPip, bool);
     itkBooleanMacro(NoPip);
 
     itkSetMacro(Ensemble, bool);
     itkGetConstMacro(Ensemble, bool);
     itkBooleanMacro(Ensemble);
 
     itkSetMacro(GpuId, unsigned int);
     itkGetConstMacro(GpuId, unsigned int);
 
     /**
      * @brief vector of ModelParams.
      * Size > 1 only for ensemble prediction.
      */
     std::vector<ModelParams> m_ParamQ;
 
     /**
      * @brief Holds paths to other input image modalities.
      * 
      */
     std::vector<mitk::Image::ConstPointer> m_OtherModalPaths;
 
 
     /**
      * @brief Renders the output LabelSetImage.
      * To called in the main thread.
      */
     void RenderOutputBuffer();
 
     /**
      * @brief Get the Output Buffer object
      * 
      * @return LabelSetImage::Pointer 
      */
     LabelSetImage::Pointer GetOutputBuffer();
 
     /**
      * @brief Sets the outputBuffer to nullptr
      * 
      */
     void ClearOutputBuffer();
 
     /**
     *  @brief Returns the DataStorage from the ToolManager
     */
     mitk::DataStorage *GetDataStorage();
 
+    mitk::DataNode *GetRefNode();
   protected:
   
     /**
      * @brief Construct a new nnUNet Tool object and temp directory.
      * 
      */
     nnUNetTool();
 
     /**
      * @brief Destroy the nnUNet Tool object and deletes the temp directory.
      * 
      */
     ~nnUNetTool();
 
     /**
      * @brief Overriden method from the tool manager to execute the segmentation
      * Implementation:
      * 1. Saves the inputAtTimeStep in a temporary directory.
      * 2. Copies other modalities, renames and saves in the temporary directory, if required.
      * 3. Sets RESULTS_FOLDER and CUDA_VISIBLE_DEVICES variables in the environment.
      * 3. Iterates through the parameter queue (m_ParamQ) and executes "nnUNet_predict" command with the parameters
      * 4. Expects an output image to be saved in the temporary directory by the python proces. Loads it as
      *    LabelSetImage and returns.
      * 
      * @param inputAtTimeStep 
      * @param timeStep 
      * @return LabelSetImage::Pointer 
      */
     LabelSetImage::Pointer ComputeMLPreview(const Image *inputAtTimeStep, TimeStepType timeStep) override;
     void UpdateCleanUp() override;
     void SetNodeProperties(LabelSetImage::Pointer) override;
 
 
   private:
     std::string m_MitkTempDir;
     std::string m_nnUNetDirectory;
     std::string m_ModelDirectory;
     std::string m_PythonPath;
     std::string m_PostProcessingJsonDirectory;
     //bool m_UseGPU; kept for future
     //bool m_AllInGPU; 
     bool m_MixedPrecision;
     bool m_Mirror;
     bool m_NoPip;
     bool m_MultiModal;
     bool m_Ensemble = false;
     LabelSetImage::Pointer m_OutputBuffer;
     unsigned int m_GpuId;
   };
 } // namespace mitk
 #endif
diff --git a/Modules/SegmentationUI/Qmitk/QmitknnUNetToolSlots.cpp b/Modules/SegmentationUI/Qmitk/QmitknnUNetToolSlots.cpp
index 7ce9dae6be..81692cc70c 100644
--- a/Modules/SegmentationUI/Qmitk/QmitknnUNetToolSlots.cpp
+++ b/Modules/SegmentationUI/Qmitk/QmitknnUNetToolSlots.cpp
@@ -1,327 +1,328 @@
 #include "QmitknnUNetToolGUI.h"
 #include <QDir>
 #include <QDirIterator>
 #include <QMessageBox>
 #include <algorithm>
 
 void QmitknnUNetToolGUI::EnableWidgets(bool enabled)
 {
   Superclass::EnableWidgets(enabled);
   m_Controls.previewButton->setEnabled(false);
 }
 
 void QmitknnUNetToolGUI::ClearAllComboBoxes()
 {
   m_Controls.modelBox->clear();
   m_Controls.taskBox->clear();
   m_Controls.foldBox->clear();
   m_Controls.trainerBox->clear();
 }
 
 template <typename T>
 T QmitknnUNetToolGUI::FetchFoldersFromDir(const QString &path)
 {
   T folders;
   for (QDirIterator it(path, QDir::AllDirs, QDirIterator::NoIteratorFlags); it.hasNext();)
   {
     it.next();
     if (!it.fileName().startsWith('.'))
     {
       folders.push_back(it.fileName());
     }
   }
   return folders;
 }
 
 void QmitknnUNetToolGUI::OnDirectoryChanged(const QString &resultsFolder)
 {
   m_Controls.previewButton->setEnabled(false);
   this->ClearAllComboBoxes();
   m_ModelDirectory = resultsFolder + QDir::separator() + "nnUNet";
   auto models = FetchFoldersFromDir<QStringList>(m_ModelDirectory);
   QStringList validlist; // valid list of models supported by nnUNet
   validlist << "2d"
             << "3d_lowres"
             << "3d_fullres"
             << "3d_cascade_fullres"
             << "ensembles";
   std::for_each(models.begin(),
                 models.end(),
                 [this, validlist](QString model)
                 {
                   if (validlist.contains(model, Qt::CaseInsensitive))
                     m_Controls.modelBox->addItem(model);
                 });
 }
 
 void QmitknnUNetToolGUI::OnModelChanged(const QString &text)
 {
   QString updatedPath(QDir::cleanPath(m_ModelDirectory + QDir::separator() + text));
   m_Controls.taskBox->clear();
   auto datasets = FetchFoldersFromDir<QStringList>(updatedPath);
   std::for_each(datasets.begin(), datasets.end(), [this](QString dataset) { m_Controls.taskBox->addItem(dataset); });
 }
 
 void QmitknnUNetToolGUI::OnTaskChanged(const QString &text)
 {
   QString updatedPath = QDir::cleanPath(m_ModelDirectory + QDir::separator() + m_Controls.modelBox->currentText() +
                                         QDir::separator() + text);
   m_Controls.trainerBox->clear();
   m_Controls.plannerBox->clear();
   auto trainerPlanners = FetchFoldersFromDir<QStringList>(updatedPath);
   QStringList trainers, planners;
   foreach (QString trainerPlanner, trainerPlanners)
   {
     trainers << trainerPlanner.split("__", QString::SplitBehavior::SkipEmptyParts).first();
     planners << trainerPlanner.split("__", QString::SplitBehavior::SkipEmptyParts).last();
   }
   trainers.removeDuplicates();
   planners.removeDuplicates();
   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 &trainerSelected)
 {
   m_Controls.foldBox->clear();
   if (m_Controls.modelBox->currentText() != "ensembles")
   {
     QString updatedPath(QDir::cleanPath(m_ModelDirectory + QDir::separator() + m_Controls.modelBox->currentText() +
                                         QDir::separator() + m_Controls.taskBox->currentText() + QDir::separator() +
                                         m_Controls.trainerBox->currentText() + "__" + trainerSelected));
     auto folds = FetchFoldersFromDir<QStringList>(updatedPath);
     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)
     {
       m_Controls.previewButton->setEnabled(true);
     }
   }
   else
   {
     m_Controls.previewButton->setEnabled(true);
   }
 }
 
 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)));
         mitk::nnUNetTool::Pointer tool = this->GetConnectedToolAs<mitk::nnUNetTool>();
         defaultImage->SetDataStorage(tool->GetDataStorage());
-        defaultImage->SetSelectedNode(tool->GetDataStorage()->GetNode());
-        //defaultImage->setDisabled(true);
+        defaultImage->SetPredicate(this->m_MultiModalPredicate);
+        defaultImage->SetSelectedNode(tool->GetRefNode());
+        defaultImage->setDisabled(true);
         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>(this->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 : this->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, this->m_Modalities.begin() + posIdx); 
     // re-adding all widgets in the order
     for (int i = 0; i < static_cast<int>(this->m_Modalities.size()); ++i)
     {
       QmitkDataStorageComboBox *multiModalBox = this->m_Modalities[i];
       m_Controls.advancedSettingsLayout->addWidget(multiModalBox, this->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.";
   QMessageBox *messageBox = new QMessageBox(QMessageBox::Critical, nullptr, stream.str().c_str());
   messageBox->exec();
   delete messageBox;
   MITK_ERROR << stream.str();
 }
 
 void QmitknnUNetToolGUI::SegmentationResultHandler(mitk::nnUNetTool *tool)
 {
   MITK_INFO << "Finished slot";
   tool->RenderOutputBuffer();
   this->SetLabelSetPreview(tool->GetMLPreview());
   tool->IsTimePointChangeAwareOn();
   m_Controls.statusLabel->setText("<b>STATUS: </b><i>Segmentation task finished successfully.</i>");
 }