Hi I have installed StandalonePsychoPy3_PY2-3.1.2-win32 on Windows 7. The Windows has been installed on Virtualbox. I have made a Stroop task with the Builder and I have tested it on a system which runs properly. But when I want to run it on my system, first, I get the following error message: […

Hi @alirezakr , from past posts, this looks like an issue with your openGL drivers, and they will need to be updated. [image] OpenGL drivers error Coding I have no solution but just thought I’d mention I get the same error (Windows 10, psychopy v3.0.5; BUILDER). I’ve not u…

AssertionError: SetDeviceGammaRamp failed

Builder

dvbridges May 29, 2019, 9:43am 2

Hi @alirezakr, from past posts, this looks like an issue with your openGL drivers, and they will need to be updated.

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AssertionError: SetDeviceGammaRamp failed

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