diff --git a/Modules/IGT/IO/mitkNavigationToolStorageSerializer.cpp b/Modules/IGT/IO/mitkNavigationToolStorageSerializer.cpp
index 55c02958e8..afd851fec3 100644
--- a/Modules/IGT/IO/mitkNavigationToolStorageSerializer.cpp
+++ b/Modules/IGT/IO/mitkNavigationToolStorageSerializer.cpp
@@ -1,101 +1,101 @@
 /*===================================================================
 
 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/Compress.h>
 #include <Poco/Path.h>
 #include <Poco/File.h>
 
 #include "mitkNavigationToolStorageSerializer.h"
 #include "mitkNavigationToolWriter.h"
 #include "mitkIGTException.h"
 #include "mitkIGTIOException.h"
 #include <mitkStandaloneDataStorage.h>
 #include <mitkSceneIO.h>
 #include <mitkIOUtil.h>
 
 #include <sstream>
 
 
 
 mitk::NavigationToolStorageSerializer::NavigationToolStorageSerializer()
 {
   //create temp directory
   m_tempDirectory = mitk::IOUtil::CreateTemporaryDirectory();
   //Poco::File myFile(m_tempDirectory);
   //myFile.createDirectory();
 }
 
 mitk::NavigationToolStorageSerializer::~NavigationToolStorageSerializer()
 {
  //remove temp directory
  Poco::File myFile(m_tempDirectory);
  try
   {
   if (myFile.exists()) myFile.remove(true);
   }
  catch(...)
   {
    MITK_ERROR << "Can't remove temp directory " << m_tempDirectory << "!";
   }
 }
 
 bool mitk::NavigationToolStorageSerializer::Serialize(std::string filename, mitk::NavigationToolStorage::Pointer storage)
 {
   //save every tool to temp directory
   mitk::NavigationToolWriter::Pointer myToolWriter = mitk::NavigationToolWriter::New();
   for(int i=0; i<storage->GetToolCount();i++)
   {
-    std::string fileName = m_tempDirectory + Poco::Path::separator() + "NavigationTool" + convertIntToString(i) + ".tool";
-    if (!myToolWriter->DoWrite(fileName,storage->GetTool(i)))
+    std::string tempFileName = m_tempDirectory + Poco::Path::separator() + "NavigationTool" + convertIntToString(i) + ".tool";
+    if (!myToolWriter->DoWrite(tempFileName,storage->GetTool(i)))
       {
-        mitkThrowException(mitk::IGTIOException) << "Could not write tool to tempory directory: " << filename;
+        mitkThrowException(mitk::IGTIOException) << "Could not write tool to tempory directory: " << tempFileName;
       }
   }
   //add all files to zip archive
   std::ofstream file( filename.c_str(), std::ios::binary | std::ios::out);
   if (!file.good()) //test if the zip archive is ready for writing
   {
     //first: clean up
     for (int i=0; i<storage->GetToolCount();i++)
     {
-      std::string fileName = m_tempDirectory + Poco::Path::separator() + "NavigationTool" + convertIntToString(i) + ".tool";
-      std::remove(fileName.c_str());
+      std::string tempFileName = m_tempDirectory + Poco::Path::separator() + "NavigationTool" + convertIntToString(i) + ".tool";
+      std::remove(tempFileName.c_str());
     }
     //then: throw an exception
     mitkThrowException(mitk::IGTIOException) << "Could not open a file for writing: " << filename;
   }
   Poco::Zip::Compress zipper( file, true );
   for (int i=0; i<storage->GetToolCount();i++)
   {
     std::string fileName = m_tempDirectory + Poco::Path::separator() + "NavigationTool" + convertIntToString(i) + ".tool";
     zipper.addFile(fileName,myToolWriter->GetFileWithoutPath(fileName));
     std::remove(fileName.c_str()); //delete file
   }
  zipper.close();
  file.close();
 
  return true;
  }
 
 std::string mitk::NavigationToolStorageSerializer::convertIntToString(int i)
  {
   std::string s;
   std::stringstream out;
   out << i;
   s = out.str();
   return s;
  }