Isaac Sim Version
4.5.0
Operating System
Ubuntu 22.04
Actually Zorin 17.2 OS which is based on Ubuntu 22.04
GPU Information
- Model: RTX 4080
- Driver Version: NVIDIA Driver 560.35.03.
Topic Description - After a seemingly errorless pip install i get module not found errors when i attempt to run isaacsim
Detailed Description
Per Gemini 2.5: The fact that the exact same ModuleNotFoundError: No module named 'isaacsim.simulation_app' followed by the IndexError: list index out of range persists strongly suggests that this is not an issue with a corrupted local installation on your end, but rather a problem with how the Isaac Sim 4.5.0 pip packages are structured or how the main isaacsim script attempts to locate its necessary components.
The error indicates that the main isaacsim script first tries to directly import isaacsim.simulation_app. When this fails, it uses a fallback mechanism involving glob.glob() to search for simulation_app.py in an expected location (likely .../site-packages/isaacsim-app-*/isaacsim/simulation_app.py). The IndexError means this search also came up empty.
Your previous find command located simulation_app.py at: /home/j***/miniconda3/envs/env_isaacsim/lib/python3.10/site-packages/isaacsim/exts/isaacsim.simulation_app/isaacsim/simulation_app/simulation_app.py
This path doesn’t seem to align with what the isaacsim launch script’s glob pattern is looking for. This discrepancy is likely the root cause and points to an issue within the official Isaac Sim pip packages.
Steps to Reproduce
conda activate env_isaacsim
Uninstall all isaacsim related packages. Be thorough.
This command finds all pip installed packages with ‘isaacsim’ in the name and uninstalls them.
pip freeze | grep isaacsim | xargs pip uninstall -y
Also uninstall omniverse-kit, a core dependency
pip uninstall omniverse-kit -y
Verify uninstallation (e.g., pip list | grep isaacsim should be empty or nearly empty)
echo “Verifying uninstallation…”
pip list | grep isaacsim
pip list | grep omniverse-kit
Upgrade pip
pip install --upgrade pip
Reinstall Isaac Sim (all and extscache bundles together)
echo “Reinstalling Isaac Sim…”
pip install ‘isaacsim[all,extscache]==4.5.0’ --extra-index-url https://pypi.nvidia.com
Ensure EULA is accepted (set it in your.bashrc or.zshrc for persistence)
export OMNI_KIT_ACCEPT_EULA=YES
Try running isaacsim again
isaacsim
Error Messages
Traceback (most recent call last):
File “/home/j***/miniconda3/envs/env_isaacsim/lib/python3.10/site-packages/isaacsim/init.py”, line 90, in expose_api
from isaacsim.simulation_app import AppFramework, SimulationApp
ModuleNotFoundError: No module named ‘isaacsim.simulation_app’
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File “/home/j***/miniconda3/envs/env_isaacsim/bin/isaacsim”, line 5, in
from isaacsim import main
File “/home/j***/miniconda3/envs/env_isaacsim/lib/python3.10/site-packages/isaacsim/init.py”, line 170, in
AppFramework, SimulationApp = expose_api()
File “/home/j***/miniconda3/envs/env_isaacsim/lib/python3.10/site-packages/isaacsim/init.py”, line 96, in expose_api
path = glob.glob(
IndexError: list index out of range
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Additional Information
What I’ve Tried
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Related Issues
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