ERROR: GLEW initalization error: Missing GL version

[datonefaridze]

Hi, I followed tutorials accoding to this documentation,
I have exported lines in my: .bashrc, .zshrc (i am using .zsh):

export LD_LIBRARY_PATH=/home/dato/.mujoco/mujoco210/bin
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/lib/nvidia
export PATH="$LD_LIBRARY_PATH:$PATH"
export LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libGLEW.so

when i run: python examples/train_bc_rnn.py --debug to test my installation it gives me an error: ERROR: GLEW initalization error: Missing GL version
when i check my environmental variables in .zsh/bash terminal, LD_PRELOAD env variable is present, I don't know how to proceed forward

[amandlek]

Can you give us more information on what platform and machine you're running on? To make sure we can try to reproduce your issue. This definitely seems like a robosuite installation issue, so it might also be useful to raise an issue there.

[datonefaridze]

@amandlek It's ubuntu 20.04, I think deleting the linke export LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libGLEW.so helped, but don't know why (I don't know exactly because when i rebooted it worked, so not sure which operation did the job(i tried many things), but it should be export LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libGLEW.so)

[amandlek]

So I believe that this is due to the mujoco-py library - the LD_PRELOAD export needs to be there when using on-screen rendering, but it should be unset when running off-screen rendering (which is what we do during training runs to log videos)