# What's the problem? How to deal?

**URL:** https://discourse.vtk.org/t/whats-the-problem-how-to-deal/1884
**Category:** Support
**Created:** [October 8, 2019, 2:41pm UTC](https://discourse.vtk.org/t/whats-the-problem-how-to-deal/1884 "2019-10-08T14:41:42Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![tdchen](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/t/858c86/32.png) [@tdchen](https://discourse.vtk.org/u/tdchen)
#### Post date: [October 8, 2019, 2:41pm UTC](https://discourse.vtk.org/t/whats-the-problem-how-to-deal/1884/1 "2019-10-08T14:41:43Z")

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My program used to run quite fluently.  
It used the vtk7.1 static library.  
But today when it was running on a new server with win10, it shows the following error and than stopped:  
“ERROR: in …\VTK\Rendering\OpenGL2\vtkOpenGLRenderWindow.cxx line 640  
vtkWin32OpenGLRenderWindow[047C9FB8]: GL version 2.1 with the gpu\_shader4 extension is not surported by your graphics driver”  
What’s the problem? How to deal with it?  
Thank you in advance.

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### Author: ![lassoan](https://discourse.vtk.org/user_avatar/discourse.vtk.org/lassoan/32/50_2.png) [@lassoan](https://discourse.vtk.org/u/lassoan)
#### Post date: [October 8, 2019, 3:49pm UTC](https://discourse.vtk.org/t/whats-the-problem-how-to-deal/1884/2 "2019-10-08T15:49:38Z")

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Do you connect to the server via Windows remote desktop?

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### Author: ![tdchen](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/t/858c86/32.png) [@tdchen](https://discourse.vtk.org/u/tdchen)
#### Post date: [October 9, 2019, 12:06am UTC](https://discourse.vtk.org/t/whats-the-problem-how-to-deal/1884/3 "2019-10-09T00:06:42Z")

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No, I used the server as a local machine.  
It seems that vtk need opengl3.2 or above.  
Thank you.

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### Author: ![lassoan](https://discourse.vtk.org/user_avatar/discourse.vtk.org/lassoan/32/50_2.png) [@lassoan](https://discourse.vtk.org/u/lassoan)
#### Post date: [October 9, 2019, 12:31am UTC](https://discourse.vtk.org/t/whats-the-problem-how-to-deal/1884/4 "2019-10-09T00:31:08Z")

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Yes, OpenGL requirements of VTK’s current rendering backend is higher than it used to be.

Note that if you have a server that supports the required OpenGL features, it may still not work via Windows remote desktop (if you create a render windows while connected via Windows remote desktop, Windows may report lower OpenGL version).

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### Author: ![tdchen](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/t/858c86/32.png) [@tdchen](https://discourse.vtk.org/u/tdchen)
#### Post date: [October 9, 2019, 10:28pm UTC](https://discourse.vtk.org/t/whats-the-problem-how-to-deal/1884/5 "2019-10-09T22:28:18Z")

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Thank you Andras Lasso.  
I will remenber what you said.