# cannot export to CGNS format

**URL:** https://discourse.paraview.org/t/cannot-export-to-cgns-format/12261
**Category:** ParaView Support
**Created:** [June 9, 2023, 3:57pm UTC](https://discourse.paraview.org/t/cannot-export-to-cgns-format/12261 "2023-06-09T15:57:39Z")
**Posts on this page:** 6
**Page:** 1

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### Author: ![Rigel](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/r/8e7dd6/32.png) [@Rigel](https://discourse.paraview.org/u/Rigel)
#### Post date: [June 9, 2023, 3:57pm UTC](https://discourse.paraview.org/t/cannot-export-to-cgns-format/12261/1 "2023-06-09T15:57:39Z")

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Hi,

I cannot export my dataset to CGNS format using ParaView 5.11.1 (default version downloaded from the website):

> Client Information:  
> Version: 5.11.1  
> VTK Version: 9.2.20220823  
> Qt Version: 5.15.2  
> vtkIdType size: 64bits  
> Embedded Python: On  
> Python Library Path: /ccc/scratch/cont003/gen7178/alvesrig/ParaView-5.11.1-MPI-Linux-Python3.9-x86\_64/lib/python3.9  
> Python Library Version: 3.9.13 (main, Mar 30 2023, 16:46:40) [GCC 7.3.1 20180303 (Red Hat 7.3.1-5)]  
> Python Numpy Support: On  
> Python Numpy Path: /ccc/scratch/cont003/gen7178/alvesrig/ParaView-5.11.1-MPI-Linux-Python3.9-x86\_64/lib/python3.9/site-packages/numpy  
> Python Numpy Version: 1.21.1  
> Python Matplotlib Support: On  
> Python Matplotlib Path: /ccc/scratch/cont003/gen7178/alvesrig/ParaView-5.11.1-MPI-Linux-Python3.9-x86\_64/lib/python3.9/site-packages/matplotlib  
> Python Matplotlib Version: 3.2.1  
> Python Testing: Off  
> MPI Enabled: On  
> ParaView Build ID: superbuild 2c64f06366aa320e98d98577af18bad64ad9a630 (!1076)  
> Disable Registry: Off  
> Test Directory:  
> Data Directory:  
> SMP Backend: TBB  
> SMP Max Number of Threads: 72  
> OpenGL Vendor: NVIDIA Corporation  
> OpenGL Version: 3.2.0 NVIDIA 510.108.03  
> OpenGL Renderer: Tesla V100-PCIE-32GB/PCIe/SSE2  
> Accelerated filters overrides available: No
> 
> Connection Information:  
> Remote Connection: Yes  
> Separate Render Server: No  
> Reverse Connection: No  
> Number of Processes: 36  
> Disable Remote Rendering: Off  
> IceT: On  
> Tile Display: Off  
> vtkIdType size: 64bits  
> SMP Backend: TBB  
> SMP Max Number of Threads: 72  
> Embedded Python: On  
> Python Library Path: /ccc/scratch/cont003/gen7178/alvesrig/ParaView-5.11.1-MPI-Linux-Python3.9-x86\_64/lib/python3.9  
> Python Library Version: 3.9.13 (main, Mar 30 2023, 16:46:40) [GCC 7.3.1 20180303 (Red Hat 7.3.1-5)]  
> Python Numpy Support: On  
> Python Numpy Path: /ccc/scratch/cont003/gen7178/alvesrig/ParaView-5.11.1-MPI-Linux-Python3.9-x86\_64/lib/python3.9/site-packages/numpy  
> Python Numpy Version: 1.21.1  
> Python Matplotlib Support: On  
> Python Matplotlib Path: /ccc/scratch/cont003/gen7178/alvesrig/ParaView-5.11.1-MPI-Linux-Python3.9-x86\_64/lib/python3.9/site-packages/matplotlib  
> Python Matplotlib Version: 3.2.1  
> OpenGL Vendor: NVIDIA Corporation  
> OpenGL Version: 4.5.0 NVIDIA 510.108.03  
> OpenGL Renderer: Tesla V100-PCIE-32GB/PCIe/SSE2  
> Headless support: None  
> Accelerated filters overrides available: No

I get the following error message:

 ![Captura de tela de 2023-06-09 17-48-50](https://discourse.paraview.org/uploads/default/original/2X/7/778ca63ea7ea1e7ca7973626d08cf07da4f1faaa.jpeg)

This is not the first time I have ‘GetVoidPointer is not supported by this class’ problems after using the ‘AngularPeriodicFilter’; I think it is a bug inside this class. Could you please help me?

Thanks a lot,

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<div class="post-metadata">

### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [June 12, 2023, 7:03am UTC](https://discourse.paraview.org/t/cannot-export-to-cgns-format/12261/2 "2023-06-12T07:03:34Z")

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Indeed, output of the “AngularPeriodicFilter” do not support GetVoidPointer, unless you uncheck the “Compute Rotation On The Fly” checkbox.

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### Author: ![Rigel](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/r/8e7dd6/32.png) [@Rigel](https://discourse.paraview.org/u/Rigel)
#### Post date: [June 12, 2023, 11:31am UTC](https://discourse.paraview.org/t/cannot-export-to-cgns-format/12261/3 "2023-06-12T11:31:41Z")

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Thanks Mathieu for the reply. Is it possible to change this? Because unchecking the “Compute Rotations On The Fly” option breaks the performance of your work…

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### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [June 12, 2023, 11:38am UTC](https://discourse.paraview.org/t/cannot-export-to-cgns-format/12261/4 "2023-06-12T11:38:36Z")

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You will need to rewrite the CGNS writer to not use GetVoidPointer.

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<div class="post-metadata">

### Author: ![Rigel](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/r/8e7dd6/32.png) [@Rigel](https://discourse.paraview.org/u/Rigel)
#### Post date: [June 12, 2023, 11:50am UTC](https://discourse.paraview.org/t/cannot-export-to-cgns-format/12261/5 "2023-06-12T11:50:18Z")

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Thanks. Is it possible to include this as a feature request in the list of suggestions for the future versions of ParaView? It would be a very welcome change in my opinion.

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<div class="post-metadata">

### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [June 12, 2023, 11:50am UTC](https://discourse.paraview.org/t/cannot-export-to-cgns-format/12261/6 "2023-06-12T11:50:59Z")

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You can open an issue here: [https://gitlab.kitware.com/paraview/paraview/-/issues](https://gitlab.kitware.com/paraview/paraview/-/issues)