diff --git a/Core/Code/DataManagement/mitkBaseData.cpp b/Core/Code/DataManagement/mitkBaseData.cpp
index 0da1b20a84..f7da7c69a6 100644
--- a/Core/Code/DataManagement/mitkBaseData.cpp
+++ b/Core/Code/DataManagement/mitkBaseData.cpp
@@ -1,363 +1,363 @@
 /*=========================================================================
 
 Program:   Medical Imaging & Interaction Toolkit
 Language:  C++
 Date:      $Date$
 Version:   $Revision$
 
 Copyright (c) German Cancer Research Center, Division of Medical and
 Biological Informatics. All rights reserved.
 See MITKCopyright.txt or http://www.mitk.org/copyright.html for details.
 
 This software is distributed WITHOUT ANY WARRANTY; without even
 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 PURPOSE.  See the above copyright notices for more information.
 
 =========================================================================*/
 
 
 #include "mitkBaseData.h"
 #include <itkObjectFactoryBase.h>
 
 
 #define MITK_WEAKPOINTER_PROBLEM_WORKAROUND_ENABLED
 
 mitk::BaseData::BaseData() : 
   m_RequestedRegionInitialized(false), m_SmartSourcePointer(NULL), 
   m_SourceOutputIndexDuplicate(0), m_Initialized(true), 
   m_Unregistering(false), m_CalculatingExternalReferenceCount(false), 
   m_ExternalReferenceCount(-1)
 {
   m_TimeSlicedGeometry = TimeSlicedGeometry::New();
   m_PropertyList = PropertyList::New(); 
 }
 
 mitk::BaseData::BaseData( const BaseData &other ): 
-itk::DataObject(),
+itk::DataObject(), mitk::OperationActor(),  
 m_RequestedRegionInitialized(other.m_RequestedRegionInitialized),
 m_SmartSourcePointer(other.m_SmartSourcePointer), 
 m_SourceOutputIndexDuplicate(other.m_SourceOutputIndexDuplicate),
 m_Initialized(other.m_Initialized), m_Unregistering(other.m_Unregistering),
 m_CalculatingExternalReferenceCount(other.m_CalculatingExternalReferenceCount),
 m_ExternalReferenceCount(other.m_ExternalReferenceCount)
 {
   m_TimeSlicedGeometry = dynamic_cast<mitk::TimeSlicedGeometry*>(other.m_TimeSlicedGeometry->Clone().GetPointer());
   m_PropertyList = other.m_PropertyList->Clone(); 
 }
 
 mitk::BaseData::~BaseData() 
 {
   m_SmartSourcePointer = NULL;
 }
 
 void mitk::BaseData::InitializeTimeSlicedGeometry(unsigned int timeSteps)
 {
   mitk::TimeSlicedGeometry::Pointer timeGeometry = this->GetTimeSlicedGeometry();
 
   mitk::Geometry3D::Pointer g3d = mitk::Geometry3D::New();
   g3d->Initialize();
 
  if ( timeSteps > 1 )
  {
     mitk::ScalarType timeBounds[] = {0.0, 1.0};
     g3d->SetTimeBounds( timeBounds );
  }
 
   // The geometry is propagated automatically to the other items,
   // if EvenlyTimed is true...
   timeGeometry->InitializeEvenlyTimed( g3d.GetPointer(), timeSteps );
 }
 
 void mitk::BaseData::UpdateOutputInformation()
 {
   if ( this->GetSource() )
   {
     this->GetSource()->UpdateOutputInformation();
   }
   if(m_TimeSlicedGeometry.IsNotNull())
     m_TimeSlicedGeometry->UpdateInformation();
 }
 
 const mitk::TimeSlicedGeometry* mitk::BaseData::GetUpdatedTimeSlicedGeometry()
 {
   SetRequestedRegionToLargestPossibleRegion();
 
   UpdateOutputInformation();
 
   return GetTimeSlicedGeometry();
 }
 
 void mitk::BaseData::Expand( unsigned int timeSteps )
 {
   if( m_TimeSlicedGeometry.IsNotNull() )
     m_TimeSlicedGeometry->ExpandToNumberOfTimeSteps( timeSteps );
 }
 
 const mitk::Geometry3D* mitk::BaseData::GetUpdatedGeometry(int t)
 {
   SetRequestedRegionToLargestPossibleRegion();
 
   UpdateOutputInformation();
 
   return GetGeometry(t);
 }
 
 void mitk::BaseData::SetGeometry(Geometry3D* aGeometry3D)
 {
 if(aGeometry3D!=NULL)
   {
     TimeSlicedGeometry::Pointer timeSlicedGeometry = dynamic_cast<TimeSlicedGeometry*>(aGeometry3D);
     if ( timeSlicedGeometry.IsNotNull() )
       m_TimeSlicedGeometry = timeSlicedGeometry;
     else
     {
       timeSlicedGeometry = TimeSlicedGeometry::New();
       m_TimeSlicedGeometry = timeSlicedGeometry;   
       timeSlicedGeometry->InitializeEvenlyTimed(aGeometry3D, 1);
     }
     Modified();
   }
   else if( m_TimeSlicedGeometry.IsNotNull() ) 
   {
     m_TimeSlicedGeometry = NULL;
     Modified();
   }
   return;
 }
 
 void mitk::BaseData::SetClonedGeometry(const Geometry3D* aGeometry3D)
 {
   SetGeometry(static_cast<mitk::Geometry3D*>(aGeometry3D->Clone().GetPointer()));
 }
 
 void mitk::BaseData::SetClonedGeometry(const Geometry3D* aGeometry3D, unsigned int time)
 {
   if (m_TimeSlicedGeometry)
   {
     m_TimeSlicedGeometry->SetGeometry3D(static_cast<mitk::Geometry3D*>(aGeometry3D->Clone().GetPointer()), time);
   }
 }
 
 bool mitk::BaseData::IsEmptyTimeStep(unsigned int) const
 {
   return IsInitialized() == false;
 }
 
 bool mitk::BaseData::IsEmpty() const
 {
   if(IsInitialized() == false)
     return true;
   const TimeSlicedGeometry* timeGeometry = const_cast<BaseData*>(this)->GetUpdatedTimeSlicedGeometry();
   if(timeGeometry == NULL)
     return true;
   unsigned int timeSteps = timeGeometry->GetTimeSteps();
   for ( unsigned int t = 0 ; t < timeSteps ; ++t )
   {
     if(IsEmptyTimeStep(t) == false)
       return false;
   }
   return true;
 }
 
 itk::SmartPointer<mitk::BaseProcess> mitk::BaseData::GetSource() const
 {
   return static_cast<mitk::BaseProcess*>(Superclass::GetSource().GetPointer());
 }
 
 int mitk::BaseData::GetExternalReferenceCount() const
 {
   if(m_CalculatingExternalReferenceCount==false) //this is only needed because a smart-pointer to m_Outputs (private!!) must be created by calling GetOutputs.
   {
     m_CalculatingExternalReferenceCount = true;
 
     m_ExternalReferenceCount = -1;
 
     int realReferenceCount = GetReferenceCount();
 
     if(GetSource().IsNull())
     {
       m_ExternalReferenceCount = realReferenceCount;
       m_CalculatingExternalReferenceCount = false;
       return m_ExternalReferenceCount;
     }
 
     mitk::BaseProcess::DataObjectPointerArray outputs = m_SmartSourcePointer->GetOutputs();
 
     unsigned int idx;
     for (idx = 0; idx < outputs.size(); ++idx)
     {
       //references of outputs that are not referenced from someone else (reference additional to the reference from this BaseProcess object) are interpreted as non-existent 
       if(outputs[idx]==this)
         --realReferenceCount;
     }
     m_ExternalReferenceCount = realReferenceCount;
     if(m_ExternalReferenceCount<0)
       m_ExternalReferenceCount=0;
     m_CalculatingExternalReferenceCount = false;
   }
   else
     return -1;
   return m_ExternalReferenceCount;
 }
 
 void mitk::BaseData::UnRegister() const
 {
 #ifdef MITK_WEAKPOINTER_PROBLEM_WORKAROUND_ENABLED
   if(GetReferenceCount()>1)
   {
     Superclass::UnRegister();
     if((m_Unregistering==false) && (m_SmartSourcePointer.IsNotNull()))
     {
       m_Unregistering=true;
       // the order of the following boolean statement is important:
       // this->GetSource() returns a SmartPointer,
       // which increases and afterwards decreases the reference count,
       // which may result in an ExternalReferenceCount of 0, causing
       // BaseProcess::UnRegister() to destroy us (also we already
       // about to do that).
       if((this->m_SmartSourcePointer->GetExternalReferenceCount()==0) || (this->GetSource().IsNull()))
         m_SmartSourcePointer=NULL; // now the reference count is zero and this object has been destroyed; thus nothing may be done after this line!!
       else
         m_Unregistering=false;
     }
   }
   else
 #endif
     Superclass::UnRegister(); // now the reference count is zero and this object has been destroyed; thus nothing may be done after this line!!
 }
 
 void mitk::BaseData::ConnectSource(itk::ProcessObject *arg, unsigned int idx) const
 {
 #ifdef MITK_WEAKPOINTER_PROBLEM_WORKAROUND_ENABLED
   itkDebugMacro( "connecting source  " << arg
     << ", source output index " << idx);
 
   if ( GetSource().GetPointer() != arg || m_SourceOutputIndexDuplicate != idx)
   {
     m_SmartSourcePointer = dynamic_cast<mitk::BaseProcess*>(arg);
     m_SourceOutputIndexDuplicate = idx;
     Modified();
   }
 #endif
 }
 
 mitk::PropertyList::Pointer mitk::BaseData::GetPropertyList() const
 {
   return m_PropertyList;
 }
 
 
 mitk::BaseProperty::Pointer mitk::BaseData::GetProperty(const char *propertyKey) const
 {
   return m_PropertyList->GetProperty(propertyKey);
 }
 
 void mitk::BaseData::SetProperty(const char *propertyKey,
                                  BaseProperty* propertyValue)
 {
   m_PropertyList->SetProperty(propertyKey, propertyValue);
 }
 
 void mitk::BaseData::SetPropertyList(PropertyList *pList)
 {
   m_PropertyList = pList;
 }
 
 void mitk::BaseData::SetOrigin(const mitk::Point3D& origin)
 {
   mitk::TimeSlicedGeometry* timeSlicedGeometry = GetTimeSlicedGeometry();
   
   assert(timeSlicedGeometry!=NULL);
 
   mitk::Geometry3D* geometry;
 
   unsigned int steps = timeSlicedGeometry->GetTimeSteps();
 
   for(unsigned int timestep = 0; timestep < steps; ++timestep)
   {
     geometry = GetGeometry(timestep);
     if(geometry != NULL)
     {
       geometry->SetOrigin(origin);
     }
     if(GetTimeSlicedGeometry()->GetEvenlyTimed())
     {
       GetTimeSlicedGeometry()->InitializeEvenlyTimed(geometry, steps);
       break;
     }
   }
 }
 
 unsigned long mitk::BaseData::GetMTime() const
 {
   unsigned long time = Superclass::GetMTime();
   if(m_TimeSlicedGeometry.IsNotNull())
   {
     if((time < m_TimeSlicedGeometry->GetMTime()))
     {
       Modified();
       return Superclass::GetMTime();
     }
     //unsigned long geometryTime = m_TimeSlicedGeometry->GetMTime();
     //if(time < geometryTime)
     //{
     //  return geometryTime;
     //}
   }
   return time;
 }
 
 void mitk::BaseData::CopyInformation( const itk::DataObject* data )
 {
   const Self* bd = dynamic_cast<const Self*>(data);
   if (bd != NULL)
   {
     m_TimeSlicedGeometry = dynamic_cast<TimeSlicedGeometry*>(bd->GetTimeSlicedGeometry()->Clone().GetPointer());
     m_PropertyList = bd->GetPropertyList()->Clone();
   }
   else
   {
     // pointer could not be cast back down; this can be the case if your filters input
     // and output objects differ in type; then you have to write your own GenerateOutputInformation method
     itkExceptionMacro(<< "mitk::BaseData::CopyInformation() cannot cast "
       << typeid(data).name() << " to "
       << typeid(Self*).name() );
   }
 
 }
 
 bool mitk::BaseData::IsInitialized() const
 {
   return m_Initialized;
 }
 
 void mitk::BaseData::Clear()
 {
   this->ClearData();
   this->InitializeEmpty();
 }
 
 void mitk::BaseData::ClearData()
 {
   if(m_Initialized)
   {
     ReleaseData();
     m_Initialized = false;
   }
 }
 
 void mitk::BaseData::ExecuteOperation(mitk::Operation* /*operation*/)
 {
   //empty by default. override if needed!
 }
 
 void mitk::BaseData::PrintSelf(std::ostream& os, itk::Indent indent) const
 {
   os << std::endl;
   os << indent << " TimeSlicedGeometry: ";
   if(GetTimeSlicedGeometry() == NULL)
     os << "NULL" << std::endl;
   else
     GetTimeSlicedGeometry()->Print(os, indent);
 }