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This issue was created automatically from an original Mantis Issue. Further discussion may take place here.

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Please find the attached sample program and input file. When I rub vtkFeatureEdge filter with BoundaryEdgesOn(), ideally I would expect the filter to return two boundary edges. But, one of the edge is highly discontinuous and return 12 edges in place of one. I tried cleaning the polydata but without success. When I tried edge identification for the same input in SolidView(ref: www.solidview.com), it gives me a correct output (it fails even in paraview). The following are the steps I followed to produce the error in Paraview.

1.Input(the given input file "sample.vtk") 2.FeatureEdge filter 3.Tube Filter(for better visualization) 4.Connectivity Filter (actually there should be only two unconnected edges, but here I get 13 edges)