'The GLFW library is not initialized' error

Question

'The GLFW library is not initialized' error

ViktorM opened this issue 7 years ago · 12 comments

When I tried to run Walker2dWall-v0 or HumanoidWall-v0 I always got this error:
[2017-10-23 16:30:32,093] GLFW error: 65537, desc: b'The GLFW library is not initialized'
While for example Walker2dWithSensor-v0 is running and visualizing ok. Are there any ideas this error can be fixed?

Answer 1 · 2017-10-24T01:31:07.000Z

hmm, i believe i've gotten that error when i've run it on a server with out of date drivers. What's the specs on the machine you're running? Ubuntu 16.04? GPU or No GPU?

Answer 2 · 2017-10-24T01:39:23.000Z

which version of mujoco are you using also?

Answer 3 · 2017-10-24T02:17:12.000Z

Laptop with Ubuntu 16.04, GPU GTX1070, Mujoco 1.31

Answer 4 · 2017-10-24T02:25:52.000Z

hmm i just tested it out on my similar setup and couldn't repro, but let's try to dig in a bit. Are you just trying to run the manual control example? If not can you share how it is you're testing?

https://github.com/Breakend/gym-extensions/blob/master/examples/manual_control_example.py

python examples/manual_control_example.py Walker2dWall-v0

Answer 5 · 2017-10-24T02:32:37.000Z

I can try it. But I tried to train agent with my RL algorithms. With usual Walker2d and Humanoid env I had no problems.

Answer 6 · 2017-10-24T02:39:28.000Z

Hmm, can you also post your version of openai gym and mujoco_py?

I want to try to recreate the setup and see what's happening

Answer 7 · 2017-10-24T03:09:58.000Z

pip install mujoco-py==0.5.7 it works with Mujoco 1.31

manual_control_example.py isn't working for me, it requires roboschool which I don't have installed.

Answer 8 · 2017-10-24T03:14:09.000Z

Now my mujoco installation seems is totally broken - the same errors I get running usual Gym environments.

Answer 9 · 2017-10-24T03:19:15.000Z

Sorry, missed question about Gym - it's the latest version

Answer 10 · 2017-10-27T02:21:50.000Z

did you ever figure this out? if you comment out the roboschool part it should still work

Answer 11 · 2017-10-28T23:23:06.000Z

Looks like glfw doesn't like when there are different copies of it - installed and shipped with Mujoco. I've just uninstalled it with "pip uninstall glfw" and Mujoco visualization and training started working again. I can run your environments now, thanks!

Answer 12 · 2022-08-29T16:21:18.000Z

Uninstalling glfw may be not an ideal solution -- the above workaround might work when legacy mujoco_py/gym are used but some certain packages do require glfw (e.g., dm_control).

It happens because there are many different copies of libgl.so libglfw.so libraries, so one could use PRELOAD to specify which GL library to load.

.../site-packages/glfw/x11/libglfw.so
~/.mujoco/mujoco210/bin/libglfw.so.3
/usr/lib/x86_64-linux-gnu/libGLEW.so

Or one could use MUJOCO_GL=EGL instead of GLFW if applicable.