[Paraview] SafeDownCast to vtkDoubleArray fails

[Natalie Happenhofer]

Hi!
I need to cast my Point Data to a vtkDoubleArray, but it fails:

vtkPointData *scaldat = input -> GetPointData();
vtkDoubleArray *scalars = vtkDoubleArray::New();
scalars = vtkDoubleArray::SafeDownCast(scaldat); 
if(!scalars) vtkErrorMacro("SafeDownCast to vtkDoubleArray failed");

and everytime I run the program I get that vtkErrorMacro. 
as far as I know from the input files, the PointData should be float, but casting to vtkFloatArray fails as well. Why? and what can I do about it?

thx a lot,
NH

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