[Bug Report] AttributeError: 'NoneType' object has no attribute 'get_model

[songtm]

Describe the bug

run the create_empty.py will get the "AttributeError: 'NoneType' object has no attribute 'get_model'" error output

Steps to reproduce

[6.438s] [ext: isaacsim.core.prims-0.3.7] startup
[6.495s] [ext: omni.warp-1.5.0] startup
2025-04-29 08:19:34 [6,447ms] [Error] [carb.scripting-python.plugin] AttributeError: 'NoneType' object has no attribute 'get_model'

At:
  D:\Tools\Omniverse\Library\IsaacLab\_isaac_sim\extscache\omni.kit.browser.sample-1.4.8\omni\kit\browser\sample\extension.py(114): register_sample_folder
  d:/tools/omniverse/library/isaaclab/_isaac_sim/extscache/omni.warp-1.5.0/omni/warp/_extension/__init__.py(206): on_startup
  D:\Tools\Omniverse\Library\IsaacLab\_isaac_sim\kit\kernel\py\omni\ext\_impl\_internal.py(164): _startup_ext
  D:\Tools\Omniverse\Library\IsaacLab\_isaac_sim\kit\kernel\py\omni\ext\_impl\_internal.py(224): startup
  D:\Tools\Omniverse\Library\IsaacLab\_isaac_sim\kit\kernel\py\omni\ext\_impl\_internal.py(328): startup_extension
  PythonExtension.cpp::startup()(2): <module>
  D:\Tools\Omniverse\Library\IsaacLab\\_isaac_sim\exts\isaacsim.simulation_app\isaacsim\simulation_app\simulation_app.py(427): _start_app
  D:\Tools\Omniverse\Library\IsaacLab\\_isaac_sim\exts\isaacsim.simulation_app\isaacsim\simulation_app\simulation_app.py(212): __init__
  D:\Tools\Omniverse\Library\IsaacLab\source\isaaclab\isaaclab\app\app_launcher.py(780): _create_app
  D:\Tools\Omniverse\Library\IsaacLab\source\isaaclab\isaaclab\app\app_launcher.py(131): __init__
  D:\Tools\Omniverse\Library\IsaacLab\scripts\tutorials\00_sim\create_empty.py(29): <module>

2025-04-29 08:19:34 [6,447ms] [Error] [omni.ext.plugin] [ext: omni.warp-1.5.0] Failed to startup python extension.
[6.661s] [ext: omni.kit.window.extensions-1.4.25] startup
[6.676s] [ext: omni.sensors.nv.wpm-2.4.0-coreapi] startup
[6.680s] [ext: isaacsim.core.api-4.2.16] startup
[6.698s] [ext: omni.replicator.core-1.11.35] startup
2025-04-29 08:19:34 [6,779ms] [Warning] [omni.replicator.core.scripts.extension] No material configuration file, adding configuration to material settings directly.
[6.855s] [ext: isaacsim.gui.components-1.0.9] startup

System Info

Describe the characteristic of your environment:

• Commit: 2e6946af
• Isaac Sim Version: 4.5.0-rc.36+release.19112.f59b3005.gl
• OS: win11
• GPU: RTX4060 laptop GPU
• CUDA: 12.6
• GPU Driver: 560.94

Additional context

None.

Checklist

• [x] I have checked that there is no similar issue in the repo (required)
• [x] I have checked that the issue is not in running Isaac Sim itself and is related to the repo

Acceptance Criteria

Add the criteria for which this task is considered done. If not known at issue creation time, you can add this once the issue is assigned.

• [ ] Criteria 1
• [ ] Criteria 2

[RandomOakForest]

Thank you for posting this. Which version of Isaac Lab is this? Thanks.

[songtm]

Thank you for posting this. Which version of Isaac Lab is this? Thanks.

IsaacLab 2.1.0; I just find #563's attach log has this error msg too

full_log.txt

[RandomOakForest]

Thank you for following up. The team will review this.