AttributeError: 'NoneType' object has no attribute 'get_current_context'

[hub2nature]

Hi,

I'm a student and I'm trying to use MuJoCo for hopper-v4.

I'm looking for some help with the error I got ( mentioned below). I am using mujoco 2.3.3, gymnasium 0.28.1, PyOpenGL=3.1.7, glfw=2.5.0

Exception ignored in: <function OffScreenViewer.del at 0x7ca17d9facb0> Traceback (most recent call last): File "/usr/local/lib/python3.10/dist-packages/gymnasium/envs/mujoco/mujoco_rendering.py", line 191, in del File "/usr/local/lib/python3.10/dist-packages/gymnasium/envs/mujoco/mujoco_rendering.py", line 188, in free File "/usr/local/lib/python3.10/dist-packages/mujoco/glfw/init.py", line 35, in free AttributeError: 'NoneType' object has no attribute 'get_current_context' Exception ignored in: <function GLContext.del at 0x7ca17d9e92d0> Traceback (most recent call last): File "/usr/local/lib/python3.10/dist-packages/mujoco/glfw/init.py", line 41, in del File "/usr/local/lib/python3.10/dist-packages/mujoco/glfw/init.py", line 35, in free AttributeError: 'NoneType' object has no attribute 'get_current_context'

[kevinzakka]

This should be fixed in https://github.com/google-deepmind/mujoco/commit/1c7809e54261009698b5baab569faf700c8f8dad and will be available in the next MuJoCo release.

[kankanzheli]

Are you referring to the next MuJoCo release as the future version of MuJoCo or is the version I am currently using too old.

[nutsintheshell]

Are you referring to the next MuJoCo release as the future version of MuJoCo or is the version I am currently using too old.

I have the similar error like yours. I add renderer.__del__()at the end of the code and solve the problem. It's probably the problem of the current version.

[thakur-sachin]

I had this error: AttributeError: 'NoneType' object has no attribute 'eglQueryString'

This error looks similar to something I faced. I resolved it by following these steps:

I resolved it by downloading mujoco zip, extracting mujoco210 to $home/.mujoco/

I then added the libglew.so to the LD_PRELOAD using export LD_PRELOAD=$LD_PRELOAD:/home/sachin/.mujoco/mujoco210/bin/libglew.so