# ParaView crashing when detecting overlapping cells in unstructured grid
**URL:** https://discourse.paraview.org/t/paraview-crashing-when-detecting-overlapping-cells-in-unstructured-grid/14913
**Category:** ParaView Support
**Created:** [June 24, 2024, 2:45pm UTC](https://discourse.paraview.org/t/paraview-crashing-when-detecting-overlapping-cells-in-unstructured-grid/14913 "2024-06-24T14:45:39Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@ahernsean](https://discourse.paraview.org/u/ahernsean)
#### Post date: [June 24, 2024, 2:45pm UTC](https://discourse.paraview.org/t/paraview-crashing-when-detecting-overlapping-cells-in-unstructured-grid/14913/1 "2024-06-24T14:45:39Z")
When applying the Overlapping Cells Detector (vtkOverlappingCellsDetector) to an unstructured grid, ParaView crashes (or sometimes hangs). We’re hoping to use this to determine what’s wrong with the attached mesh.
Version: 5.12.1
Platform: Windows 11
[ug.vtu](https://discourse.paraview.org/uploads/short-url/qRJieIltS29AnVV4fGkqh0tt8re.vtu) (2.7 MB)
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [June 24, 2024, 4:25pm UTC](https://discourse.paraview.org/t/paraview-crashing-when-detecting-overlapping-cells-in-unstructured-grid/14913/2 "2024-06-24T16:25:27Z")
Hi @ahernsean
I reproduce the issue, this is likely cause by the presence of polyhedron in your dataset.
This should not happen though, could you open an issue: [https://gitlab.kitware.com/paraview/paraview/-/issues](https://gitlab.kitware.com/paraview/paraview/-/issues) ?
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### Author:  [@ahernsean](https://discourse.paraview.org/u/ahernsean)
#### Post date: [June 24, 2024, 6:10pm UTC](https://discourse.paraview.org/t/paraview-crashing-when-detecting-overlapping-cells-in-unstructured-grid/14913/3 "2024-06-24T18:10:04Z")
Issue opened: [paraview/paraview#22678](https://gitlab.kitware.com/paraview/paraview/-/issues/22678)