PyOpenGL: glCreateProgram() causes NullFunctionError

Question

I am just trying to run exactly this sample code to test the installation: https://gist.github.com/ousttrue/c4ae334fc1505cdf4cd7

It fails on glCreateProgram() eventhough i have instaled PyOpenGL, PyOpenGL-accelerate and freeglut using the whl files from here: https://www.lfd.uci.edu/~gohlke/pythonlibs/

Error:

  File "C:\Program Files (x86)\Python\Python35\lib\site- 
  packages\OpenGL\platform\baseplatform.py", line 410, in __call__ 
  self.__name__, self.__name__, 
  OpenGL.error.NullFunctionError: Attempt to call an undefined function 
  glCreateProgram, check for bool(glCreateProgram) before calling

The Code from this tutorial which does not include a shader works just fine: https://noobtuts.com/python/opengl-introduction So it is just glCreateProgram() that fails.

I have also copied the DLL files into SystenWOW64 and System32, as well as the folder my Script runs in.

Has anyone an idea where to search for the error.

I run Windows 10 64 Bit with 64 bit Python 3.5 via Remote Desktop

For glCreateProgram, at least OpenGL 2.0 or OpenGL ES 2.0 is required. Use print( glGetString(GL_VERSION) ) (right before initialize()) to print the OpenGL version. — Rabbid76
– Rabbid76, Commented Jul 23, 2018 at 15:45
Windows Remote Desktop uses software OpenGL 1.1, which does not support shaders. Try a workaround or RemoteFx. — cgohlke
– cgohlke, Commented Jul 23, 2018 at 17:07
For other check also that the glCreate functions are called after a rendering context has been created (nor by glut or any other way) — user3680029
– user3680029, Commented Oct 18, 2021 at 19:34

Alexander Bayer · Accepted Answer · 2018-07-30 08:59:03Z

1

The problem was that, when you log in on remote desktop you somehow can't access the graphics card. Connecting the screen directly to the computer solved the problem.

answered Jul 30, 2018 at 8:59

Alexander Bayer

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