# Paraview error VGL

**URL:** https://discourse.paraview.org/t/paraview-error-vgl/9440
**Category:** ParaView Support
**Created:** [April 15, 2022, 10:03pm UTC](https://discourse.paraview.org/t/paraview-error-vgl/9440 "2022-04-15T22:03:58Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![kmilo9999](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/k/cc9497/32.png) [@kmilo9999](https://discourse.paraview.org/u/kmilo9999)
#### Post date: [April 15, 2022, 10:03pm UTC](https://discourse.paraview.org/t/paraview-error-vgl/9440/1 "2022-04-15T22:03:58Z")

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Hello,

I getting the following error when running paraview on a cluster environment using vnc.

[VGL] ERROR: in glXGetConfig–  
[VGL] 1124: Could not obtain RGB visual on the server suitable for off-screen rendering

I already checked the xservers are running on the nodes. Is there anything I could do to debug this problem?

Thank you.

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<div class="post-metadata">

### Author: ![danlipsa](https://discourse.paraview.org/user_avatar/discourse.paraview.org/danlipsa/32/1563_2.png) [@danlipsa](https://discourse.paraview.org/u/danlipsa)
#### Post date: [April 18, 2022, 2:05pm UTC](https://discourse.paraview.org/t/paraview-error-vgl/9440/2 "2022-04-18T14:05:51Z")

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vnc does not support opengl by default.

Options to fix this include

1. turbovnc + virtualgl  
[https://virtualgl.org/vgldoc/2\_1\_1/](https://virtualgl.org/vgldoc/2_1_1/)

2. nomachine  
The free version takes control of the server screen, so you’ll have to be the only person using that server. I think there is a paid version that works like vnc.

3. using a headless display such as EGL or OSMesa on the server and connect using ParaView Client running on your client machine  
[https://docs.paraview.org/en/latest/ReferenceManual/parallelDataVisualization.html](https://docs.paraview.org/en/latest/ReferenceManual/parallelDataVisualization.html)