diff --git a/Plugins/org.mitk.gui.qt.xnat/src/internal/QmitkXnatTreeBrowserView.cpp b/Plugins/org.mitk.gui.qt.xnat/src/internal/QmitkXnatTreeBrowserView.cpp
index cc9cd9cf51..4b0d7cfba1 100644
--- a/Plugins/org.mitk.gui.qt.xnat/src/internal/QmitkXnatTreeBrowserView.cpp
+++ b/Plugins/org.mitk.gui.qt.xnat/src/internal/QmitkXnatTreeBrowserView.cpp
@@ -1,313 +1,325 @@
 /*===================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center,
 Division of Medical and Biological Informatics.
 All rights reserved.
 
 This software is distributed WITHOUT ANY WARRANTY; without
 even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.
 
 See LICENSE.txt or http://www.mitk.org for details.
 
 ===================================================================*/
 
 #include "QmitkXnatTreeBrowserView.h"
 
 // Qmitk
 #include "QmitkXnatObjectEditorInput.h"
 #include "QmitkXnatEditor.h"
 #include "org_mitk_gui_qt_xnatinterface_Activator.h"
 
 // Blueberry
 #include <berryIWorkbenchPage.h>
 #include <berryPlatform.h>
 
 // CTK XNAT Core
 #include "ctkXnatFile.h"
 
 // Qt
 #include <QDir>
 #include <QMenu>
 #include <QAction>
 #include <QDirIterator>
 
 // MITK
 #include <mitkDataStorage.h>
 #include <QmitkIOUtil.h>
 
 // Poco
 #include <Poco/Zip/Decompress.h>
 
 const std::string QmitkXnatTreeBrowserView::VIEW_ID = "org.mitk.views.xnat.treebrowser";
 
 QmitkXnatTreeBrowserView::QmitkXnatTreeBrowserView() :
 m_TreeModel(new ctkXnatTreeModel()),
 m_Tracker(0),
 m_DownloadPath(berry::Platform::GetPreferencesService()->GetSystemPreferences()->Node("/XnatConnection")->Get("Download Path", "")),
 m_DataStorageServiceTracker(mitk::org_mitk_gui_qt_xnatinterface_Activator::GetContext())
 {
   m_DataStorageServiceTracker.open();
 
   // Set DownloadPath
   if (m_DownloadPath.isEmpty())
   {
     QString xnatFolder = "XNAT_DOWNLOADS";
     QDir dir(mitk::org_mitk_gui_qt_xnatinterface_Activator::GetContext()->getDataFile("").absoluteFilePath());
     dir.mkdir(xnatFolder);
     dir.setPath(dir.path() + "/" + xnatFolder);
     m_DownloadPath = dir.path() + "/";
   }
 }
 
 QmitkXnatTreeBrowserView::~QmitkXnatTreeBrowserView()
 {
   delete m_TreeModel;
   delete m_Tracker;
 }
 
 void QmitkXnatTreeBrowserView::SetFocus()
 {
 }
 
 void QmitkXnatTreeBrowserView::CreateQtPartControl(QWidget *parent)
 {
   // Create GUI widgets from the Qt Designer's .ui file
   m_Controls.setupUi(parent);
   m_Controls.treeView->setModel(m_TreeModel);
   m_Controls.treeView->header()->hide();
   m_Controls.labelError->setText("Please use the 'Connect' button in the Preferences.");
   m_Controls.labelError->setStyleSheet("QLabel { color: red; }");
 
   m_SelectionProvider = new berry::QtSelectionProvider();
   this->SetSelectionProvider();
   m_Controls.treeView->setSelectionMode(QAbstractItemView::SingleSelection);
   m_Controls.treeView->setContextMenuPolicy(Qt::CustomContextMenu);
 
   m_Tracker = new mitk::XnatSessionTracker(mitk::org_mitk_gui_qt_xnatinterface_Activator::GetXnatModuleContext());
   m_NodeMenu = new QMenu(m_Controls.treeView);
 
   connect(m_Controls.treeView, SIGNAL(customContextMenuRequested(const QPoint&)),
     this, SLOT(NodeTableViewContextMenuRequested(const QPoint&)));
   connect(m_Tracker, SIGNAL(AboutToBeClosed(ctkXnatSession*)), this, SLOT(CleanTreeModel(ctkXnatSession*)));
   connect(m_Tracker, SIGNAL(Opened(ctkXnatSession*)), this, SLOT(UpdateSession(ctkXnatSession*)));
 
   m_Tracker->Open();
 
   ctkXnatSession* session;
 
   try
   {
     session = mitk::org_mitk_gui_qt_xnatinterface_Activator::GetXnatModuleContext()->GetService(
       mitk::org_mitk_gui_qt_xnatinterface_Activator::GetXnatModuleContext()->GetServiceReference<ctkXnatSession>());
   }
   catch (std::invalid_argument)
   {
     session = 0;
   }
 
   if (session != 0)
   {
     m_Controls.labelError->setVisible(false);
   }
   else
   {
     m_Controls.labelError->setVisible(true);
   }
 
   connect(m_Controls.treeView, SIGNAL(activated(const QModelIndex&)), this, SLOT(OnActivatedNode(const QModelIndex&)));
 }
 
 void QmitkXnatTreeBrowserView::OnActivatedNode(const QModelIndex& index)
 {
   if (!index.isValid()) return;
 
   berry::IWorkbenchPage::Pointer page = GetSite()->GetPage();
   QmitkXnatObjectEditorInput::Pointer oPtr(new QmitkXnatObjectEditorInput(index.data(Qt::UserRole).value<ctkXnatObject*>()));
   berry::IEditorInput::Pointer editorInput(oPtr);
   berry::IEditorPart::Pointer reuseEditor = page->FindEditor(editorInput);
 
   if (reuseEditor)
   {
     // Just set it activ
     page->Activate(reuseEditor);
   }
   else
   {
     QList<berry::IEditorReference::Pointer> editors =
       page->FindEditors(berry::IEditorInput::Pointer(0), QmitkXnatEditor::EDITOR_ID, berry::IWorkbenchPage::MATCH_ID);
 
     if (editors.isEmpty())
     {
       ctkXnatFile* file = dynamic_cast<ctkXnatFile*>(oPtr->GetXnatObject());
       if (file != NULL)
       {
         // If the selected node is a file, so show it in MITK
         InternalFileDownload(index, true);
       }
       else
       {
         // No XnatEditor is currently open, create a new one
         page->OpenEditor(editorInput, QmitkXnatEditor::EDITOR_ID);
       }
     }
     else
     {
       // Reuse an existing editor
       reuseEditor = editors.front()->GetEditor(true);
       page->ReuseEditor(reuseEditor.Cast<berry::IReusableEditor>(), editorInput);
       page->Activate(reuseEditor);
     }
   }
 }
 
 void QmitkXnatTreeBrowserView::SetSelectionProvider()
 {
   GetSite()->SetSelectionProvider(m_SelectionProvider);
 }
 
 void QmitkXnatTreeBrowserView::UpdateSession(ctkXnatSession* session)
 {
   if (session != 0 && session->isOpen())
   {
     m_Controls.labelError->setVisible(false);
     // Fill model and show in the GUI
     m_TreeModel->addDataModel(session->dataModel());
     m_Controls.treeView->reset();
     m_SelectionProvider->SetItemSelectionModel(m_Controls.treeView->selectionModel());
   }
 }
 
 void QmitkXnatTreeBrowserView::CleanTreeModel(ctkXnatSession* session)
 {
   if (session != 0)
   {
     m_TreeModel->removeDataModel(session->dataModel());
     m_Controls.treeView->reset();
   }
 }
 
 void QmitkXnatTreeBrowserView::InternalFileDownload(const QModelIndex& index, bool loadData)
 {
   QVariant variant = m_TreeModel->data(index, Qt::UserRole);
   if (variant.isValid())
   {
     ctkXnatFile* file = dynamic_cast<ctkXnatFile*>(variant.value<ctkXnatObject*>());
     if (file != NULL)
     {
       QDir downDir(m_DownloadPath);
       QString filePath = m_DownloadPath + file->name();
 
       // Testing if the file exists already
       if (downDir.exists(file->name()))
       {
         MITK_INFO << "File '" << file->name().toStdString() << "' already exists!";
       }
       else
       {
         if (file->property("collection") == QString("DICOM"))
         {
           ctkXnatObject* parent = file->parent();
 
           filePath = m_DownloadPath + parent->property("label") + ".zip";
           parent->download(filePath);
 
           std::ifstream in(filePath.toStdString().c_str(), std::ios::binary);
           poco_assert(in);
 
           // decompress to XNAT_DOWNLOAD dir
           Poco::Zip::Decompress dec(in, Poco::Path(m_DownloadPath.toStdString()));
           dec.decompressAllFiles();
 
           in.close();
           QFile::remove(filePath);
         }
         else
         {
           MITK_INFO << "Download started ...";
           MITK_INFO << "...";
           file->download(filePath);
 
           // Testing if the file exists now
           if (downDir.exists(file->name()))
           {
             MITK_INFO << "Download of " << file->name().toStdString() << " was completed!";
           }
           else
           {
             MITK_INFO << "Download of " << file->name().toStdString() << " failed!";
           }
         }
       }
       if (downDir.exists(file->name()) || file->property("collection") == "DICOM")
       {
         if (loadData)
         {
           if (file->property("collection") == "DICOM")
           {
             // Search for the downloaded file an its file path
             QDirIterator it(m_DownloadPath, QStringList() << file->name(), QDir::Files, QDirIterator::Subdirectories);
             while (it.hasNext()) {
               it.next();
               filePath = it.filePath();
             }
           }
+
+          if (filePath.isEmpty())
+          {
+            MITK_INFO << "Decompressing failed!";
+            return;
+          }
+          else if (!QFile(filePath).exists())
+          {
+            MITK_INFO << "Decompressing failed!";
+            return;
+          }
+
           mitk::IDataStorageService* dsService = m_DataStorageServiceTracker.getService();
           mitk::DataStorage::Pointer dataStorage = dsService->GetDataStorage()->GetDataStorage();
           QStringList list;
           list << filePath;
           try
           {
             QmitkIOUtil::Load(list, *dataStorage);
           }
           catch (const mitk::Exception& e)
           {
             MITK_INFO << e;
             return;
           }
           mitk::RenderingManager::GetInstance()->InitializeViewsByBoundingObjects(
             dsService->GetDataStorage()->GetDataStorage());
         }
       }
     }
     else
     {
       MITK_INFO << "Selection was not a file!";
     }
   }
 }
 
 void QmitkXnatTreeBrowserView::OnContextMenuDownloadFile()
 {
   QModelIndex index = m_Controls.treeView->currentIndex();
   InternalFileDownload(index, false);
 }
 
 void QmitkXnatTreeBrowserView::OnContextMenuDownloadAndOpenFile()
 {
   QModelIndex index = m_Controls.treeView->currentIndex();
   InternalFileDownload(index, true);
 }
 
 void QmitkXnatTreeBrowserView::NodeTableViewContextMenuRequested(const QPoint & pos)
 {
   m_NodeMenu->clear();
   QModelIndex index = m_Controls.treeView->indexAt(pos);
   QVariant variant = m_TreeModel->data(index, Qt::UserRole);
   if (variant.isValid())
   {
     ctkXnatFile* file = dynamic_cast<ctkXnatFile*>(variant.value<ctkXnatObject*>());
     if (file != NULL)
     {
       QAction* actShow = new QAction("Download and Open", m_NodeMenu);
       QAction* actDownload = new QAction("Download", m_NodeMenu);
       m_NodeMenu->addAction(actShow);
       m_NodeMenu->addAction(actDownload);
       connect(actShow, SIGNAL(triggered()), this, SLOT(OnContextMenuDownloadAndOpenFile()));
       connect(actDownload, SIGNAL(triggered()), this, SLOT(OnContextMenuDownloadFile()));
       m_NodeMenu->popup(QCursor::pos());
     }
   }
 }