use the python version of mujoco3.2.6 under win11, an OSError: [WinError 1114] The dynamic link library (DLL) initialization routine failed.

[LJoson]

Intro

Hi!

I am a Robotics Engineer I use MuJoCo for my project.

My setup

mujoco 3.2.6

What's happening? What did you expect?

When I use the python version of mujoco3.2.6 under win11, an OSError: [WinError 1114] The dynamic link library (DLL) initialization routine failed. What puzzles me is that it works normally under Linux. In the end, I can only use the 2.3.7 version of mujoco under win.

Steps for reproduction

Just use pip install mujoco on the win11 platform, and then execute python -m mujoco.viewer to reproduce

Minimal model for reproduction

No response

Code required for reproduction

No response

Confirmations

• I searched the latest documentation thoroughly before posting.
• I searched previous Issues and Discussions, I am certain this has not been raised before.

[LJoson]

After many attempts, I finally found that only python of mujoco3.2.6 will cause this error on the win11 platform.The only solution is to lower the version. Are there any other solutions?

[yuvaltassa]

To clarify, are you reporting a regression in Windows support between version <= 3.2.5 and 3.2.6 ?

[xuusheep]

win10 also appear

[LJoson]

To clarify, are you reporting a regression in Windows support between version <= 3.2.5 and 3.2.6 ?

yes

[Kakcalu13]

Yes, I faced the same issue. I was developing the work on a Mac M2 and Linux using mujoco 3.2.6. However, when it came to Windows 11, I encountered the exact same issue described in the title.

I was forced to use version 3.2.3 on Windows 11 since 3.2.3 also worked on Mac and Linux

I created a simple pip that allows anyone to use their own XML or my default XML to enable FEAGI to take control. This means a lot of people (hopefully) will try it out, including non-tech-savvy users. So this is likely to be an issue for Windows users only

[saran-t]

Could you please confirm your Python version?

[LJoson]

Could you please confirm your Python version?

3.9.19

[saran-t]

Thanks. Does anyone have a stack trace?

[Kakcalu13]

Could you please confirm your Python version?

w11 in my office has version 3.12, I believe. I will post tomorrow for the accurate version using 3.2.6

Thanks. Does anyone have a stack trace?

I couldn’t install mujoco on my w8 computer, so I will need to wait until I get back to my office. I only have a Mac and Linux atm

[Kakcalu13]

Stack trace here:

C:\Users\station5\Desktop\godot-games>python -m feagi_connector_mujoco
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "C:\Users\station5\AppData\Local\Programs\Python\Python312\Lib\site-packages\feagi_connector_mujoco\__main__.py", line 24, in <module>
    from feagi_connector_mujoco import controller as feagi_controller_mujoco
  File "C:\Users\station5\AppData\Local\Programs\Python\Python312\Lib\site-packages\feagi_connector_mujoco\controller.py", line 26, in <module>
    import mujoco.viewer
  File "C:\Users\station5\AppData\Local\Programs\Python\Python312\Lib\site-packages\mujoco\__init__.py", line 76, in <module>
    _load_all_bundled_plugins()
  File "C:\Users\station5\AppData\Local\Programs\Python\Python312\Lib\site-packages\mujoco\__init__.py", line 69, in _load_all_bundled_plugins
    PLUGIN_HANDLES.append(ctypes.CDLL(os.path.join(directory, filename)))
                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\station5\AppData\Local\Programs\Python\Python312\Lib\ctypes\__init__.py", line 379, in __init__
    self._handle = _dlopen(self._name, mode)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^
OSError: [WinError 1114] A dynamic link library (DLL) initialization routine failed

C:\Users\station5\Desktop\godot-games>

ignore the feagi_connector_mujoco as it simply import mujoco.viewer.

python version here:

Python 3.12.5

OS: W11

[saran-t]

OK, I suspect this is caused by our recent LLVM/Clang version upgrade. Needs further investigation.

[saran-t]

Our CI runs on Windows Server 2022 (roughly equivelent to Windows 10) and we don't see this issue there. If anyone's able to verify this on Windows 10 as well that'd be appreciated.

[saran-t]

Could you please try installing the latest MSVC redistributable ?