# Delete coincident faces of polygonal mesh

**URL:** https://discourse.paraview.org/t/delete-coincident-faces-of-polygonal-mesh/6808
**Category:** ParaView Support
**Created:** [March 27, 2021, 11:25pm UTC](https://discourse.paraview.org/t/delete-coincident-faces-of-polygonal-mesh/6808 "2021-03-27T23:25:12Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![bflandard](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/b/47e85d/32.png) [@bflandard](https://discourse.paraview.org/u/bflandard)
#### Post date: [March 27, 2021, 11:25pm UTC](https://discourse.paraview.org/t/delete-coincident-faces-of-polygonal-mesh/6808/1 "2021-03-27T23:25:12Z")

</div>

Hi,

I’d like to delete coincident faces of a polygonal mesh imported into Paraview 5.9 from a legacy VTK file. I found a method outlined in the link below which uses a Programmable Filter. However, this method is nearly a decade old and gives an error message objecting to attribute “vtkExtractSelection” (see error message below).

I’ve also tried various combinations of filters “clean”, “clean to grid”, “connectivity” … without success (points get merged, but all coincident faces remain).

Thanks for any help or guidance with this.

Regards, Bob

[https://public.kitware.com/pipermail/paraview/2011-June/022070.html](https://public.kitware.com/pipermail/paraview/2011-June/022070.html)

> Traceback (most recent call last):  
> File “”, line 24, in   
> File “”, line 3, in RequestData  
> AttributeError: module ‘paraview.pv-vtk-all’ has no attribute ‘vtkExtractSelection’