# OpenGLRender error
**URL:** https://discourse.vtk.org/t/openglrender-error/4809
**Category:** Support
**Created:** [December 11, 2020, 8:22pm UTC](https://discourse.vtk.org/t/openglrender-error/4809 "2020-12-11T20:22:11Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@Elise\_B](https://discourse.vtk.org/u/Elise_B)
#### Post date: [December 11, 2020, 8:22pm UTC](https://discourse.vtk.org/t/openglrender-error/4809/1 "2020-12-11T20:22:11Z")
Just trying to run the Cylinder Example and getting this example, I have OpenGL in my site-packages… I’m a python beginer, any idea?
python3 CylinderExample.py
ERROR: In /work/standalone-x64-build/VTK-source/Rendering/OpenGL2/vtkXOpenGLRenderWindow.cxx,
line 273
vtkXOpenGLRenderWindow (0x129a2a0): bad X server connection. DISPLAY=Aborted (core dumped)
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### Author:  [@danlipsa](https://discourse.vtk.org/u/danlipsa)
#### Post date: [December 12, 2020, 7:03pm UTC](https://discourse.vtk.org/t/openglrender-error/4809/2 "2020-12-12T19:03:07Z")
Are you running this on a remote machine through ssh? If that is the case, OpenGL has a hard time working through a remote connection.
I recommend using nomachine or virtualgl/turbovnc to connect to the remote machine.
Dan
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### Author:  [@Elise\_B](https://discourse.vtk.org/u/Elise_B)
#### Post date: [December 12, 2020, 9:01pm UTC](https://discourse.vtk.org/t/openglrender-error/4809/3 "2020-12-12T21:01:09Z")
Hi yes exactly, ok I’ll try that,
thank you
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### Author:  [@Elise\_B](https://discourse.vtk.org/u/Elise_B)
#### Post date: [December 13, 2020, 12:38am UTC](https://discourse.vtk.org/t/openglrender-error/4809/4 "2020-12-13T00:38:10Z")
I need to istall virtualgl on the server or on my computer?
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### Author:  [@danlipsa](https://discourse.vtk.org/u/danlipsa)
#### Post date: [December 14, 2020, 2:43pm UTC](https://discourse.vtk.org/t/openglrender-error/4809/5 "2020-12-14T14:43:14Z")
I would start with nomachine as it is easier to install. The free version is only single user, but I think it has a paid version that is multiuser.
virtualgl/turbovnc is multiuser but it is trickier to install.
For both you’ll have to install parts on both server and client. virtualgl is installed on the server.
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### Author:  [@Elise\_B](https://discourse.vtk.org/u/Elise_B)
#### Post date: [December 14, 2020, 4:17pm UTC](https://discourse.vtk.org/t/openglrender-error/4809/6 "2020-12-14T16:17:10Z")
What about using Linux inside Windows using VirtualBox would that help?
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### Author:  [@danlipsa](https://discourse.vtk.org/u/danlipsa)
#### Post date: [December 14, 2020, 4:49pm UTC](https://discourse.vtk.org/t/openglrender-error/4809/7 "2020-12-14T16:49:28Z")
It depends if VirtualBox is able to use a compatible OpenGL driver (OpenGL 3.2) - a quick search shows me that people have struggled with that and it might not be possible. You could use VTK directly in Windows though - I think this is your best bet, besides using nomachine.