IsaacSim/IsaacLab is hard to use by multiple users on the same PC

[XiRouz]

When IsaacSim/Lab is installed by one user, another users might not get the full/easy experience using them. Collaborative development becomes an issue, sometimes just taking more time to launch the apps, or even makes simulations not work entirely.

IsaacSim/Lab installation has had problems in the past regarding where it puts its files, creating problems with permissions, when other user who did not install it tries to use it. There is a new one I haven't dealt with before in the v3.0.0 beta release I'd like to share as well.

Specs:
Ubuntu 22.04
IsaacSim 5.1.0 / IsaacLab 2.3.0/2.3.1
IsaacSim 6.0.0 / IsaacLab 3.0.0-beta is also mentioned

The issues I've encountered are listed below:

1. Some extensions were seemingly not cached and each time a non-installer user tried to launch Sim/Lab they were resyncing such extensions. I manually resymlinked some of the extensions inside isaaclab-env_5.1/lib/python3.11/site-packages/isaacsim/kit/data/Kit/Isaac-Sim/5.1/exts/3 in the past to be located in a shared location. Previous links were pointing towards my user's .local/share/ov/data/exts/3/... and were not available, even if other users had the same shared group on those links, and setting the group to my home folder also didn't seem to help.
2. Similar problem with write rights occurs for .log files inside the IsaacLab's virtual environment, setting the group shared by other users for the whole venv directory did not help, only the owner user seems to be able to write log files to venv.
3. I had errors about exclusive lock to data store pop up, they looked like this:
   [Error] [omni.datastore] Failed to acquire exclusive lock to data store (256>=256)
[Error] [omni.datastore] Failed to create local file data store at '.../isaaclab-env_6.0/lib/python3.12/site-packages/isaacsim/kit/cache/DerivedDataCache'
   I don't recall how we fixed it, but after some actions these errors were gone.
4. IsaacLab's URDF importer creates /tmp/IsaacLab directory where it stores temporary files when working on importing URDF to USD. Any user who launches IsaacLab first, now owns this directory, which lead to URDF importer not working for other users until the folder is deleted or the rights were reassigned. As a workaround, we added /tmp to the shared user group and used chmod g+s so that IsaacLab's temp folder would inherit the group, when created.
5. With the new Lab v3.0.0-beta release, I tried to install Lab with UV via the instructions in the docs. By default the UV installer had downloaded and installed python3.12 to my user's home folder: /home/$USER/.local/share/uv/python/cpython-3.12.... Setting the group to the shared one on IsaacLab's directory, according venv and my HOME directory did not help - users are getting "Permission denied" error when trying to launch Lab's tutorial examples, for example ./isaaclab.sh -p scripts/tutorials/01_assets/run_deformable_object.py --viz kit.
   Tried setting UV_PYTHON_INSTALL_DIR and UV_PYTHON_BIN_DIR to then install python to a shared place instead of $HOME directory, and then changing isaaclab-env_6.0/bin/python to point to that location, as well as changing "home" entry in isaaclab-env_6.0/pyvenv.cfg. This made the app launch to a certain point, but the same deformable object example crashes for non-installer users,the traceback goes as follows:

Traceback (most recent call last):
  File ".../IsaacLab_3.0.0/scripts/tutorials/01_assets/run_deformable_object.py", line 165, in <module>
    main()
  File ".../IsaacLab_3.0.0/scripts/tutorials/01_assets/run_deformable_object.py", line 153, in main
    scene_entities, scene_origins = design_scene()
                                    ^^^^^^^^^^^^^^
  File ".../IsaacLab_3.0.0/scripts/tutorials/01_assets/run_deformable_object.py", line 49, in design_scene
    cfg.func("/World/defaultGroundPlane", cfg)
  File ".../IsaacLab_3.0.0/source/isaaclab/isaaclab/utils/string.py", line 202, in __call__
    return self._resolve()(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".../IsaacLab_3.0.0/source/isaaclab/isaaclab/sim/spawners/from_files/from_files.py", line 219, in spawn_ground_plane
    raise ValueError(f"No collision prim found at path: '{prim_path}'.")
ValueError: No collision prim found at path: '/World/defaultGroundPlane'.

Same error shows when launching run_rigid_object.py.
I will try to reinstall the venv with a shared python location and share the results later.

Full log for issue number 5:

$ ./isaaclab.sh -p scripts/tutorials/01_assets/run_deformable_object.py --viz kit
[INFO] Using Python: ".../isaaclab-env_6.0/bin/python"
[WARN][AppLauncher]: There are no arguments attached to the ArgumentParser object. If you have your own arguments, please load your own arguments before calling the `AppLauncher.add_app_launcher_args` method. This allows the method to check the validity of the arguments and perform checks for argument names.
Loading user config located at: '.../isaaclab-env_6.0/lib/python3.12/site-packages/isaacsim/kit/data/Kit/IsaacLab/3.0/user.config.json'
2026-04-02T17:22:16Z [0ms] [Warning] [omni.ext.plugin] [ext: isaaclab_visualizers] Extensions config 'extension.toml' doesn't exist '.../IsaacLab_3.0.0/source/isaaclab_visualizers' or '.../IsaacLab_3.0.0/source/isaaclab_visualizers/config'
2026-04-02T17:22:16Z [3ms] [Warning] [omni.ext.plugin] [ext: extensions] Extensions config 'extension.toml' doesn't exist '.../IsaacLab_3.0.0/source/extensions' or '.../IsaacLab_3.0.0/source/extensions/config'
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WARNING: All log messages before absl::InitializeLog() is called are written to STDERR
E0000 00:00:1775150537.098881  914344 descriptor_database.cc:633] File already exists in database: grpc/health/v1/health.proto
W0000 00:00:1775150537.098921  914344 message.cc:301] Protobuf GeneratedMessageFactory: File is already registered: grpc/health/v1/health.proto
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2026-04-02T17:22:17Z [194ms] [Error] [omni.datastore] Failed to acquire exclusive lock to data store (256>=256)
2026-04-02T17:22:17Z [194ms] [Error] [omni.datastore] Failed to create local file data store at '.../isaaclab-env_6.0/lib/python3.12/site-packages/isaacsim/kit/cache/DerivedDataCache'
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|---------------------------------------------------------------------------------------------|
| Driver Version: 570.195.03    | Graphics API: Vulkan
|=============================================================================================|
| GPU | Name                             | Active | LDA | GPU Memory | Vendor-ID | LUID       |
|     |                                  |        |     |            | Device-ID | UUID       |
|     |                                  |        |     |            | Bus-ID    |            |
|---------------------------------------------------------------------------------------------|
| 0   | NVIDIA GeForce RTX 4090          | Yes: 1 |     | 24564   MB | 10de      | 0          |
|     |                                  |        |     |            | 2684      | ef0fb7d5.. |
|     |                                  |        |     |            | 1         |            |
|---------------------------------------------------------------------------------------------|
| 1   | NVIDIA GeForce RTX 4090          | Yes: 0 |     | 24564   MB | 10de      | 0          |
|     |                                  |        |     |            | 2684      | a6a82d3c.. |
|     |                                  |        |     |            | 61        |            |
|=============================================================================================|
| OS: 22.04.5 LTS (Jammy Jellyfish) ubuntu, Version: 22.04.5, Kernel: 6.8.0-90-generic
| XServer Vendor: The X.Org Foundation, XServer Version: 12101004 (1.21.1.4)
| Processor: AMD Ryzen Threadripper PRO 5975WX 32-Cores
| Cores: 32 | Logical Cores: 64
|---------------------------------------------------------------------------------------------|
| Total Memory (MB): 257562 | Free Memory: 218059
| Total Page/Swap (MB): 2047 | Free Page/Swap: 266
|---------------------------------------------------------------------------------------------|
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[5.160s] [ext: isaacsim.core.nodes-5.4.0] startup
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[5.273s] [ext: isaacsim.examples.browser-0.3.0] startup
[5.275s] [ext: omni.kit.selection-0.1.6] startup
[5.277s] [ext: isaacsim.gui.menu-2.10.2] startup
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[5.449s] [ext: omni.kit.numpy.common-0.1.3] startup
[5.451s] [ext: isaacsim.sensors.camera-1.7.0] startup
[5.467s] [ext: isaacsim.sensors.physics-1.1.0] startup
[5.483s] [ext: isaacsim.util.debug_draw-3.2.1] startup
[5.494s] [ext: isaacsim.sensors.physx-2.5.0] startup
[5.507s] [ext: omni.sensors.net-1.0.1] startup
[5.512s] [ext: omni.sensors.nv.common-3.0.0] startup
[5.526s] [ext: omni.sensors.nv.materials-2.0.0] startup
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[5.535s] [ext: omni.sensors.nv.lidar-3.0.0] startup
[5.544s] [ext: omni.sensors.nv.wpm-3.0.0] startup
[5.545s] [ext: omni.sensors.nv.radar-3.0.0] startup
[5.550s] [ext: isaacsim.sensors.rtx-15.14.1] startup
[5.573s] [ext: isaacsim.simulation_app-2.16.1] startup
[5.574s] [ext: omni.anim.curve.core-1.6.0] startup
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[5.733s] [ext: omni.kit.property.light-1.0.14] startup
2026-04-02T17:22:22Z [5,646ms] [Warning] [omni.usd] Encountered USD Warnings but USD Diagnostics are currently muted. To view USD Warnings, please set the '/persistent/app/usd/muteUsdDiagnostics' setting to false in Preferences page.
[5.773s] [ext: omni.kit.property.material-1.13.0] startup
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[5.843s] [ext: omni.ocio-0.1.1] startup
[5.844s] [ext: omni.physics.isaacsimready-110.0.7] startup
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[6.026s] [ext: omni.rtx.window.settings-0.7.2] startup
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[6.043s] [ext: semantics.schema.editor-2.0.2] startup
[6.046s] [ext: semantics.schema.property-2.0.1] startup
[6.048s] [ext: isaaclab_assets-0.3.0] startup
[6.208s] [ext: isaaclab_tasks-1.5.11] startup
[6.242s] [ext: isaaclab_mimic-1.2.3] startup
[6.243s] [ext: isaaclab_newton-0.5.9] startup
[6.244s] [ext: isaaclab_physx-0.5.11] startup
[6.244s] [ext: isaaclab_rl-0.5.0] startup
[6.245s] [ext: omni.kit.menu.common-2.0.2] startup
[6.246s] [ext: isaaclab.python-3.0.0] startup
[6.250s] Simulation App Starting
[10.721s] Simulation App Startup Complete
[10.727s] app ready
2026-04-02T17:22:27Z [10,814ms] [Warning] [omni.kit.menu.utils.layout] Multiple matching items found for layout "Physics". Found Create, Window. Change <<class 'omni.kit.menu.utils.layout.MenuLayout.SubMenu'> name:Physics> to use specific source. Using "source="Create/Physics""
2026-04-02T17:22:28Z [11,247ms] [Warning] [isaaclab_physx.physics.physx_manager] TGS solver with enable_external_forces_every_iteration=False may cause noisy velocities.
[11.373s] [ext: omni.physx.fabric-110.0.7] startup
Traceback (most recent call last):
  File ".../IsaacLab_3.0.0/scripts/tutorials/01_assets/run_deformable_object.py", line 165, in <module>
    main()
  File ".../IsaacLab_3.0.0/scripts/tutorials/01_assets/run_deformable_object.py", line 153, in main
    scene_entities, scene_origins = design_scene()
                                    ^^^^^^^^^^^^^^
  File ".../IsaacLab_3.0.0/scripts/tutorials/01_assets/run_deformable_object.py", line 49, in design_scene
    cfg.func("/World/defaultGroundPlane", cfg)
  File ".../IsaacLab_3.0.0/source/isaaclab/isaaclab/utils/string.py", line 202, in __call__
    return self._resolve()(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".../IsaacLab_3.0.0/source/isaaclab/isaaclab/sim/spawners/from_files/from_files.py", line 219, in spawn_ground_plane
    raise ValueError(f"No collision prim found at path: '{prim_path}'.")
ValueError: No collision prim found at path: '/World/defaultGroundPlane'.
2026-04-02T17:22:29Z [12,928ms] [Warning] [simulation_app.simulation_app] SimulationApp.close() was not called explicitly. Shutting down automatically
2026-04-02T17:22:30Z [13,321ms] [Warning] [rtx.hydra] RenderDelegate : Warning /rtx/hydra/readTransformsFromFabricInRenderDelegate and geometry streaming are enabled together but this can cause issues with dynamic objects not streaming correctly due to problems in the transform update.
[13.697s] Simulation App Shutting Down

[RandomOakForest]

Thank you for posting this. I will forward this to the team to review and provide guidance.