import mujoco throw me an error

[emimarz]

Describe the bug

import mujoco_py
give me an error

To Reproduce
$ pip3 install -U 'mujoco-py<2.1,>=2.0'
$ python3
import mujoco_py

Expected behavior
work

Error Messages

import mujoco_py
objc[25979]: Class GLFWApplicationDelegate is implemented in both /Users/blablabla/.mujoco/mujoco200/bin/libglfw.3.dylib (0x111838778) and /usr/local/anaconda3/lib/python3.7/site-packages/glfw/libglfw.3.dylib (0x11d6586d0). One of the two will be used. Which one is undefined.
objc[25979]: Class GLFWWindowDelegate is implemented in both /Users/blablabla/.mujoco/mujoco200/bin/libglfw.3.dylib (0x111838700) and /usr/local/anaconda3/lib/python3.7/site-packages/glfw/libglfw.3.dylib (0x11d6586f8). One of the two will be used. Which one is undefined.
objc[25979]: Class GLFWContentView is implemented in both /Users/blablabla/.mujoco/mujoco200/bin/libglfw.3.dylib (0x1118387a0) and /usr/local/anaconda3/lib/python3.7/site-packages/glfw/libglfw.3.dylib (0x11d658748). One of the two will be used. Which one is undefined.
objc[25979]: Class GLFWWindow is implemented in both /Users/blablabla/.mujoco/mujoco200/bin/libglfw.3.dylib (0x111838818) and /usr/local/anaconda3/lib/python3.7/site-packages/glfw/libglfw.3.dylib (0x11d6587c0). One of the two will be used. Which one is undefined.

Desktop (please complete the following information):

• OS: macOS 10.13.6
• Python Version 3.7.4
• mujoco-py version 2.0.2.9

Additional context
pip3 search GLFW
glfw-toolbox (1.0.1) - GLFW toolbox
glfw-cffi (0.2.0) - Foreign Function Interface wrapper for GLFW v3.x
glfw (1.8.7) - A ctypes-based wrapper for GLFW3.
INSTALLED: 1.8.7 (latest)
pyglfw (0.2.2) - Python bindings for the GLFW library
cyglfw3 (3.1.0.2) - Python bindings for GLFW 3+ using Cython
piety (0.1.0) - A modern curses compatible terminal built using Vulcan and GLFW

[shwnyao]

Any updates? I have the same issue too

[chisness]

I also have this issue, has anyone found a solution?

[aktivhoon]

I think this isn't the best solution, but this worked for me:

rm ~/.mujoco/mujoco200/bin/ligblfw*

This will remove GLFW from mujoco directoy and thus make us to skip the error message.
However it doesn't seem to be the best solution since its quite risky to remove libraries from the original mujoco directory.

[aktivhoon]

I finally noticed this is an unique problem in MacOS.
Just forget about my previous comment and change your default python to which you have installed using homebrew. This will solve the problem properly.

[apandey99]

@aktivhoon Could you provide more info on your solution? I am facing same the problem.

[empty-id]

What if I use Anaconda and don't want to change my default python to homebrew version? @aktivhoon

[empty-id]

@aktivhoon Besides, your rm solution is also not working.

[empty-id]

Anyway, this is just a warning, not an error. My code can run normally.

[raul-openai]

Hi everyone.

Unfortunately I don't think there is an easy actual fix for this, since both mujoco and pip will end up with the library. However, you should be able to change mujoco's folder's lib to point to the env you want to use.

For example with a symlink to the env's:

1. Locate the python env's dylib:

(tests) ~/Projects/tests/python $ locate libglfw.3.dylib
/Users/username/.mujoco/mjpro150/bin/libglfw.3.dylib
/Users/username/.mujoco/mujoco200/bin/libglfw.3.dylib
/Users/username/.pyenv/versions/3.7.3/envs/tests/lib/python3.7/site-packages/glfw/libglfw.3.dylib

2. Go to mujoco's bin folder:

(tests) ~/Projects/tests/python $ cd ~/.mujoco/mujoco200/bin
~/.mujoco/mujoco200/bin $ ls
MUJOCO_LOG.TXT         compile                libglfw.3.dylib        libmujoco200.dylib     mjkey.txt              simulate               testxml
basic                  derivative             libglfw3.a             libmujoco200nogl.dylib record                 testspeed

3. Move the offending dylib to a backup file, and create a symlink to point to your env / python.

~/.mujoco/mujoco200/bin $ mv libglfw.3.dylib libglfw.3.dylib.unused
~/.mujoco/mujoco200/bin $ ln -s /Users/username/.pyenv/versions/3.7.3/envs/tests/lib/python3.7/site-packages/glfw/libglfw.3.dylib libglfw.3.dylib

Result:

~/.mujoco/mujoco200/bin $ ls -las libglfw.3*
  0 lrwxr-xr-x  1 username  staff      93 Sep  1 14:04 libglfw.3.dylib -> /Users/username/.pyenv/versions/3.7.3/envs/tests/lib/python3.7/site-packages/glfw/libglfw.3.dylib
280 -rwxr-xr-x  1 username  staff  140368 Apr 16 17:38 libglfw.3.dylib.unused

This should be a good workaround, since now both mujoco and python env use the same library.
Please, let me know if it doesn't work or any other issues arise.

PS: Please note this only allows one symlink to one python environment, so some versioning issues may arise if you use multiple python environments with different glfw pip packages.

Thank you.

[wanxinjin]

I am with macOS Monterey. I have also encountered the issue:
~/.mujoco/mujoco210/bin/simulate ~/.mujoco/mujoco210/model/humanoid.xml dyld[14477]: Library not loaded: libglfw.3.dylib

I fixed this problem by running: brew install glfw

[17780537256]

Can you describe the operation process in detail?

I finally noticed this is an unique problem in MacOS.
Just forget about my previous comment and change your default python to which you have installed using homebrew. This will solve the problem properly.

Can you describe the operation process in detail?