[ITK] VTK6 migration and vtkImageData: "No scalar values found for texture input!" error in vtkOpenGLTexture

[Sebastian Ordas]

Dear List,

I have started getting the error "No scalar values found for texture 
input!" coming from vtkOpenGLTexture, while porting my code to VTK6

More precisely, I have a vtkImageData, generated by 
itkImageToVTKImageFilter, which is mapped through vtkImageResliceMapper

I have tried adding the following to itkImageToVTKImageFilter:

   m_Importer->UpdateInformation();
   vtkStreamingDemandDrivenPipeline::SetUpdateExtent(
         m_Importer->GetOutputInformation(0 /*port number*/),
         0 /*piece*/,
         2 /*number of pieces*/,
         0 /*number of ghost levels*/);
   m_Importer->Update();

.. but no luck!

I have also tried:

m_ImageData->GetPointData()->SetActiveAttribute (0, vtkPointData::SCALARS);

didn´t work either...

Any hint?

thank you,
sebastian