# RedistributeDataSet filter froze for CONVERGECFD Reader
**URL:** https://discourse.paraview.org/t/redistributedataset-filter-froze-for-convergecfd-reader/5290
**Category:** ParaView Support
**Created:** [September 8, 2020, 4:06pm UTC](https://discourse.paraview.org/t/redistributedataset-filter-froze-for-convergecfd-reader/5290 "2020-09-08T16:06:42Z")
**Posts on this page:** 13
**Page:** 1
### Author:  [@kirit\_101](https://discourse.paraview.org/u/kirit_101)
#### Post date: [September 8, 2020, 4:06pm UTC](https://discourse.paraview.org/t/redistributedataset-filter-froze-for-convergecfd-reader/5290/1 "2020-09-08T16:06:42Z")
Hi:
I have a CONVERGECFD data set, I am loading it in ParaView Version 5.8.1 mpi version. When I am using RedistributeDataSet filter, it froze after progressing to 25%.
In the attachment, you will find the data.
Any suggestions?
**attachment update:** I am not able to upload the data file. its size is 267 MB. Is there any way I can upload that kind of big file?
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [September 9, 2020, 8:26am UTC](https://discourse.paraview.org/t/redistributedataset-filter-froze-for-convergecfd-reader/5290/2 "2020-09-09T08:26:27Z")
Sure, use google drive or wetransfer.
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### Author:  [@kirit\_101](https://discourse.paraview.org/u/kirit_101)
#### Post date: [September 11, 2020, 1:42pm UTC](https://discourse.paraview.org/t/redistributedataset-filter-froze-for-convergecfd-reader/5290/3 "2020-09-11T13:42:52Z")
Hi @mwestphal: Can you check if you are able to access the data?
Data Link: [https://drive.google.com/drive/folders/1MabQJL2gKk6f1ZCCjwgF7pD90GdM30LI?usp=sharing](https://drive.google.com/drive/folders/1MabQJL2gKk6f1ZCCjwgF7pD90GdM30LI?usp=sharing)
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [September 11, 2020, 1:52pm UTC](https://discourse.paraview.org/t/redistributedataset-filter-froze-for-convergecfd-reader/5290/4 "2020-09-11T13:52:20Z")
Yes, I have access.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [October 7, 2020, 11:35am UTC](https://discourse.paraview.org/t/redistributedataset-filter-froze-for-convergecfd-reader/5290/5 "2020-10-07T11:35:57Z")
I am able to reproduce your issue. This would require further investigation to understand what is going on.
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### Author:  [@kirit\_101](https://discourse.paraview.org/u/kirit_101)
#### Post date: [October 7, 2020, 4:46pm UTC](https://discourse.paraview.org/t/redistributedataset-filter-froze-for-convergecfd-reader/5290/6 "2020-10-07T16:46:07Z")
Thanks @mwestphal.
Should I submit an issue at GitLab? ([https://gitlab.kitware.com/paraview/paraview/-/issues](https://gitlab.kitware.com/paraview/paraview/-/issues)). So the developer can track the issue.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [October 8, 2020, 8:13am UTC](https://discourse.paraview.org/t/redistributedataset-filter-froze-for-convergecfd-reader/5290/7 "2020-10-08T08:13:13Z")
Yes please. Ideally it would be nice to understand what is special about your dataset and makes ParaView crashes.
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### Author:  [@utkarsh.ayachit](https://discourse.paraview.org/u/utkarsh.ayachit)
#### Post date: [October 15, 2020, 11:25am UTC](https://discourse.paraview.org/t/redistributedataset-filter-froze-for-convergecfd-reader/5290/8 "2020-10-15T11:25:04Z")
Was this ever reported? I’ve been looking at other issues related to this filter, I’d like to make sure any other known issues are addressed too.
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### Author:  [@utkarsh.ayachit](https://discourse.paraview.org/u/utkarsh.ayachit)
#### Post date: [October 15, 2020, 12:22pm UTC](https://discourse.paraview.org/t/redistributedataset-filter-froze-for-convergecfd-reader/5290/9 "2020-10-15T12:22:45Z")
From what I can tell, it’s the `vtkCellCenters` filter that’s used internally that’s taking an inordinate amount of time when computing cell-centers for polyhedral cells.
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### Author:  [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)
#### Post date: [October 15, 2020, 12:36pm UTC](https://discourse.paraview.org/t/redistributedataset-filter-froze-for-convergecfd-reader/5290/10 "2020-10-15T12:36:00Z")
It doesn’t appear to have been reported in the issue tracker. Since the reader and filter are in VTK, I reported an issue on the VTK tracker: [https://gitlab.kitware.com/vtk/vtk/-/issues/18030](https://gitlab.kitware.com/vtk/vtk/-/issues/18030).
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### Author:  [@kirit\_101](https://discourse.paraview.org/u/kirit_101)
#### Post date: [October 19, 2020, 3:18pm UTC](https://discourse.paraview.org/t/redistributedataset-filter-froze-for-convergecfd-reader/5290/11 "2020-10-19T15:18:10Z")
@cory.quammen: Thanks for reporting.
@utkarsh.ayachit: I have found other issues when using filters with CONVERGE CFD data set:
1. Tetrahedralize: When I use Tetrahedralize filters, it progresses up to 60 %, then without showing any error message it crashes.
2. Extract Surface: When I use extract surface filters, the surface is choppy, not smooth. See the image below
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### Author:  [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)
#### Post date: [October 29, 2020, 1:31pm UTC](https://discourse.paraview.org/t/redistributedataset-filter-froze-for-convergecfd-reader/5290/12 "2020-10-29T13:31:55Z")
> [@kirit\_101](#):
>
> Extract Surface: When I use extract surface filters, the surface is choppy, not smooth. See the image below
It’s a little hard to tell from the image, but my guess is that the surface is not smooth because no surface normals are available. You can try to use the **Generate Surface Normals** filter to make the surface appear smoother.
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### Author:  [@kirit\_101](https://discourse.paraview.org/u/kirit_101)
#### Post date: [October 29, 2020, 2:19pm UTC](https://discourse.paraview.org/t/redistributedataset-filter-froze-for-convergecfd-reader/5290/13 "2020-10-29T14:19:16Z")
thanks @cory.quammen.
I have tried using Generate Surface Normal, doesn’t improve. As you can see from the attached image below. I agree it’s hard to tell from the image. I was comparing **Extract Surface** image with **Extract Block** image. You can see extract block is much smoother. Version 5.8.1 Extract block has some issues when used a python script.
Image using Generate Surface Normal:
Image using Extract Block:
