[vtkusers] vtkIterativeClosestPointTransform - Can't execute with NULL or empty input

[P B]

Hi,
 
   I  have a problem using vtkIterativeClosestPointTransform, if anyone could help that would be great! I have searched on the old vtk questions and found someone with a similar problem, but nothing is working to solve it for me. Here is the error I get when executing: 
 
 
ERROR: In ..\..\..\Installations\VTK\VTK5\Hybrid\vtkIterativeClosestPointTransform.cxx, line271
vtkIterativeClosestPointTransform[12ABE78]: Can't execute with NULL or empty input
 
and here is the code I use:
 
 
vtkPolyData * CTPolyData = NULL; 
vtkPolyData * MRPolyData = NULL; 
 
CTPolyData = vtkPolyData::New();
CTPolyData->SetPoints(CTPoints);
MRPolyData = vtkPolyData::New(); 
MRPolyData->SetPoints(MRPoints);
 
vtkIterativeClosestPointTransform * ICPTransfo = vtkIterativeClosestPointTransform::New();
vtkDataSet *source = NULL, *target = NULL;
 

ICPTransfo->GetLandmarkTransform()->SetModeToRigidBody();//SetModeToAffine();
ICPTransfo->StartByMatchingCentroidsOff();
ICPTransfo->SetMaximumMeanDistance(MaximumMeanDistance);
ICPTransfo->SetMaximumNumberOfIterations(MaxNumberOfIterations);
 

vtkMaskPoints *maskPoints1 = vtkMaskPoints::New(); maskPoints1->SetInput(CTPolyData);
vtkMaskPoints *maskPoints2 = vtkMaskPoints::New(); maskPoints2->SetInput(MRPolyData);

maskPoints1->SetMaximumNumberOfPoints(1000);
maskPoints1->GenerateVerticesOn();
maskPoints1->SetMaximumNumberOfPoints(1000);
maskPoints1->GenerateVerticesOn();
ICPTransfo->SetSource(maskPoints1);
ICPTransfo->SetTarget(maskPoints2);
 
/*ICPTransfo->SetSource((vtkPolyData*)maskPoints1);
ICPTransfo->SetTarget((vtkPolyData*)maskPoints2);*/
ICPTransfo->SetSource(maskPoints1->GetOutput());
ICPTransfo->SetTarget(maskPoints2->GetOutput());
 
 
ICPTransfo->SetMeanDistanceModeToAbsoluteValue(); 
 
// execution of ICP algorithm
ICPTransfo->Modified();
ICPTransfo->Update();
 
 
double MeanDistance = ICPTransfo->GetMeanDistance();
 
Thank you for your help!!
 
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