diff --git a/Modules/IGT/IO/mitkNavigationToolStorageDeserializer.cpp b/Modules/IGT/IO/mitkNavigationToolStorageDeserializer.cpp
index 23db54b17f..decf3a51a9 100644
--- a/Modules/IGT/IO/mitkNavigationToolStorageDeserializer.cpp
+++ b/Modules/IGT/IO/mitkNavigationToolStorageDeserializer.cpp
@@ -1,116 +1,115 @@
 /*===================================================================
 
 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.
 
 ===================================================================*/
 
 //Poco headers
 #include "Poco/Zip/Decompress.h"
 #include "Poco/Path.h"
 #include "Poco/File.h"
 
 #include "mitkNavigationToolStorageDeserializer.h"
 #include <mitkSceneIO.h>
 #include <mitkIOUtil.h>
 #include "mitkNavigationToolReader.h"
 
 //POCO
 #include <Poco/Exception.h>
 
 
 #include "mitkIGTException.h"
 #include "mitkIGTIOException.h"
 
 
 mitk::NavigationToolStorageDeserializer::NavigationToolStorageDeserializer(mitk::DataStorage::Pointer dataStorage)
   {
   m_DataStorage = dataStorage;
   //create temp directory for this reader
   m_tempDirectory = mitk::IOUtil::CreateTemporaryDirectory("NavigationToolStorageDeserializerTmp_XXXXXX",mitk::IOUtil::GetTempPath());
   }
 
 mitk::NavigationToolStorageDeserializer::~NavigationToolStorageDeserializer()
   {
   //remove temp directory
   Poco::File myFile(m_tempDirectory);
   try
     {
     if (myFile.exists()) myFile.remove();
     }
   catch(...)
     {
     MITK_ERROR << "Can't remove temp directory " << m_tempDirectory << "!";
     }
   }
 
 mitk::NavigationToolStorage::Pointer mitk::NavigationToolStorageDeserializer::Deserialize(std::string filename)
   {
   //decomress zip file into temporary directory
   decomressFiles(filename,m_tempDirectory);
 
   //now read all files and convert them to navigation tools
   mitk::NavigationToolStorage::Pointer returnValue = mitk::NavigationToolStorage::New(m_DataStorage);
   bool cont = true;
   int i;
   for (i=0; cont==true; i++)
     {
     std::string fileName = m_tempDirectory + Poco::Path::separator() + "NavigationTool" + convertIntToString(i) + ".tool";
     mitk::NavigationToolReader::Pointer myReader = mitk::NavigationToolReader::New();
     mitk::NavigationTool::Pointer readTool = myReader->DoRead(fileName);
     if (readTool.IsNull()) cont = false;
     else returnValue->AddTool(readTool);
     //delete file
     std::remove(fileName.c_str());
     }
   if(i==1)
     {
     //throw an exception here in case of not finding any tool
     m_ErrorMessage = "Error: did not find any tool. \n Is this a tool storage file?";
     mitkThrowException(mitk::IGTException)<<"Error: did not find any tool. \n Is this a tool storage file?";
     }
   return returnValue;
   }
 
 std::string mitk::NavigationToolStorageDeserializer::convertIntToString(int i)
 {
 std::string s;
 std::stringstream out;
 out << i;
 s = out.str();
 return s;
 }
 
 void mitk::NavigationToolStorageDeserializer::decomressFiles(std::string filename,std::string path)
 {
   std::ifstream file( filename.c_str(), std::ios::binary );
   if (!file.good())
     {
     m_ErrorMessage = "Cannot open '" + filename + "' for reading";
     mitkThrowException(mitk::IGTException)<<"Cannot open"+filename+" for reading";
     }
 
   try
     {
     Poco::Zip::Decompress unzipper( file, Poco::Path( path ) );
     unzipper.decompressAllFiles();
     file.close();
     }
 
   catch(Poco::IllegalStateException e) //temporary solution: replace this by defined exception handling later!
     {
     m_ErrorMessage = "Error: wrong file format! \n (please only load tool storage files)";
-    MITK_ERROR << m_ErrorMessage;
     mitkThrowException(mitk::IGTException) << m_ErrorMessage;
     }
 
   }