# vtkCPProcessor::RequestDataDescription issue in master
**URL:** https://discourse.paraview.org/t/vtkcpprocessor-requestdatadescription-issue-in-master/6013
**Category:** In Situ Support
**Created:** [December 8, 2020, 3:19pm UTC](https://discourse.paraview.org/t/vtkcpprocessor-requestdatadescription-issue-in-master/6013 "2020-12-08T15:19:38Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@Andy\_Bauer](https://discourse.paraview.org/u/Andy_Bauer)
#### Post date: [December 8, 2020, 3:19pm UTC](https://discourse.paraview.org/t/vtkcpprocessor-requestdatadescription-issue-in-master/6013/1 "2020-12-08T15:19:39Z")
I’m using the V2 scripts and it looks like vtkCPProcessor::RequestDataDescription() is always returning non-zero values for the new GUI generated scripts. Things still work correctly with the legacy Catalyst scripts. My PV version may be a week old or so though so apologies if this issue is fixed already.
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### Author:  [@utkarsh.ayachit](https://discourse.paraview.org/u/utkarsh.ayachit)
#### Post date: [December 8, 2020, 3:31pm UTC](https://discourse.paraview.org/t/vtkcpprocessor-requestdatadescription-issue-in-master/6013/2 "2020-12-08T15:31:40Z")
Fixed here: [https://gitlab.kitware.com/paraview/paraview/-/merge\_requests/4594](https://gitlab.kitware.com/paraview/paraview/-/merge_requests/4594)
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### Author:  [@Andy\_Bauer](https://discourse.paraview.org/u/Andy_Bauer)
#### Post date: [December 8, 2020, 3:56pm UTC](https://discourse.paraview.org/t/vtkcpprocessor-requestdatadescription-issue-in-master/6013/3 "2020-12-08T15:56:41Z")
That doesn’t seem to fix the issue. I just updated to PV master and am still experiencing the same issue. I have a print statement after I call vtkCPProcessor::RequestDataDescription() so I can see that it’s still getting where it shouldn’t. The data extracts aren’t getting created but I’m still generating the grid unnecessarily.
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### Author:  [@utkarsh.ayachit](https://discourse.paraview.org/u/utkarsh.ayachit)
#### Post date: [December 8, 2020, 4:24pm UTC](https://discourse.paraview.org/t/vtkcpprocessor-requestdatadescription-issue-in-master/6013/4 "2020-12-08T16:24:19Z")
report and bug with details and I’ll take a look. I know there are cases where the script cannot determine decisively if any grid will be needed and will just assume as such – can’t remember off the top of my head. Report details and I’ll see what’s going on and what’s expected.
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### Author:  [@Andy\_Bauer](https://discourse.paraview.org/u/Andy_Bauer)
#### Post date: [December 8, 2020, 4:29pm UTC](https://discourse.paraview.org/t/vtkcpprocessor-requestdatadescription-issue-in-master/6013/5 "2020-12-08T16:29:17Z")
Here it is – [https://gitlab.kitware.com/paraview/paraview/-/issues/20373](https://gitlab.kitware.com/paraview/paraview/-/issues/20373)
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### Author:  [@utkarsh.ayachit](https://discourse.paraview.org/u/utkarsh.ayachit)
#### Post date: [December 8, 2020, 6:13pm UTC](https://discourse.paraview.org/t/vtkcpprocessor-requestdatadescription-issue-in-master/6013/6 "2020-12-08T18:13:42Z")
> [@Andy\_Bauer](#):
>
> That doesn’t seem to fix the issue. I just updated to PV master and am still experiencing the same issue.
I am confused…are you saying it doesn’t work in master or doesnt’ work despite my changes? I cannot reproduce the issue with changes in [https://gitlab.kitware.com/paraview/paraview/-/merge\_requests/4594](https://gitlab.kitware.com/paraview/paraview/-/merge_requests/4594).
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### Author:  [@Andy\_Bauer](https://discourse.paraview.org/u/Andy_Bauer)
#### Post date: [December 8, 2020, 7:05pm UTC](https://discourse.paraview.org/t/vtkcpprocessor-requestdatadescription-issue-in-master/6013/7 "2020-12-08T19:05:18Z")
[https://gitlab.kitware.com/paraview/paraview/-/merge\_requests/4594](https://gitlab.kitware.com/paraview/paraview/-/merge_requests/4594) fixes the issue.