I am investigating trying to understand why changing the filter causes an abend.
Have you tried the code I have proposed ? It is quite simple.
I will try to reduce it more and test indeed this vtkPolyDataEdgeConnectivityFilter that causes problem.
In fact the problem I am facing is how to describe anti-clockwise a polygon. The vtk.vtkPolyDataConnectivityFilter() extract correctly a region. The vtk.vtkStripper() and stripper.SetJoinContiguousSegments(True) joins each segments as one entity but I need to describe the polygon with an anti-clockwise convention.
How to force this ?