Extensions are Not launching: Throwing Errors


Until yesterday, everything was working fine with Isaac Sim. I was able to load the user-created extension along with other extensions (e.g., Gain Tuner, Extension Generator, etc.) available in Isaac Sim. However, now, when I start Isaac Sim, I am encountering the following errors in my terminal.

[10.664s] [ext: omni.isaac.gain_tuner-0.1.1] startup
2023-08-24 07:10:03 [10,634ms] [Error] [omni.ext._impl.custom_importer] Failed to import python module omni.isaac.gain_tuner. Error: No module named 'omni.isaac.core'. Traceback:
Traceback (most recent call last):
  File "/home/ksu1rng/.local/share/ov/pkg/isaac_sim-2022.2.1/kit/kernel/py/omni/ext/_impl/custom_importer.py", line 76, in import_module
    return importlib.import_module(name)
  File "/home/ksu1rng/.local/share/ov/pkg/isaac_sim-2022.2.1/kit/python/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/ksu1rng/.local/share/ov/pkg/isaac_sim-2022.2.1/exts/omni.isaac.gain_tuner/omni/isaac/gain_tuner/__init__.py", line 10, in <module>
    from .extension import *
  File "/home/ksu1rng/.local/share/ov/pkg/isaac_sim-2022.2.1/exts/omni.isaac.gain_tuner/omni/isaac/gain_tuner/extension.py", line 16, in <module>
    from omni.isaac.core.utils.types import ArticulationAction
ModuleNotFoundError: No module named 'omni.isaac.core'

2023-08-24 07:10:03 [10,634ms] [Error] [carb.scripting-python.plugin] Exception: Extension python module: 'omni.isaac.gain_tuner' in '/home/ksu1rng/.local/share/ov/pkg/isaac_sim-2022.2.1/exts/omni.isaac.gain_tuner' failed to load.

  /home/ksu1rng/.local/share/ov/pkg/isaac_sim-2022.2.1/kit/kernel/py/omni/ext/_impl/_internal.py(189): startup
  /home/ksu1rng/.local/share/ov/pkg/isaac_sim-2022.2.1/kit/kernel/py/omni/ext/_impl/_internal.py(285): startup_extension
  PythonExtension.cpp::startup()(2): <module>

2023-08-24 07:10:03 [10,634ms] [Error] [omni.ext.plugin] [ext: omni.isaac.gain_tuner-0.1.1] Failed to startup python extension.

could you please let me know the reason, is this some known bug ? or some other issue ?


@ksu1rng can you provide the full log file just in case there are other underlying issues that could factor into what you are experiencing? you also mentioned user-created extensions in addition to extensions that were shipped with OV/Issac, was that working for you without conflicts before you starting seeing these errors? do you recall anything that’s changed from when it was working for you?

regarding not being able to find the module omni.issac.core, others have found ways such as reinstalling Issac but before you make that call, have you tried to reboot and/or restart the app to see if the same reports persist?


I just realized that while exploring the codebase of the omni.isaac.core module, I mistakenly placed commas where other modules had been imported in the codebase. This resulted in a series of errors. However, as soon as I rectified that issue, everything started working perfectly.


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