Hi, I am following the instructions in this thread to create a Python programmable filter with two input ports, both of which expect a vtkCompositeDataSet:
https://public.kitware.com/pipermail/paraview/2016-July/037562.html When I apply the filter I get the following error: ERROR: In /home/tbrandvik/Downloads/Paraview-5.4.1/VTK/Common/DataModel/vtkDataObjectTree.cxx, line 297 vtkMultiBlockDataSet (0x190bd160): Structure does not match. You must use CopyStructure before calling this method. This is using Paraview 5.4.1. Any ideas on why this would work for multiple vtkDataSet but not a multiple vtkCompositeDataSet as the inputs would be welcome. Cheers, Tobias
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