Issue with Isaac Lab Startup - Plugin Version Conflict (omni.physx.fabric)

Isaac Sim Version

4.5.0

Operating System

Ubuntu 22.04

GPU Information

  • Model: RTX4090
  • Driver Version: CUDA12.6

Topic Description

Detailed Description

I followed the official installation tutorial of Isaac Lab(Installation using Isaac Sim pip — Isaac Lab Documentation to create a new conda environment and installed the 4.5.0 isaac sim and lab.
I’m encountering an issue with Isaac Lab during startup, where it crashes right after the simulation app initializes. The error seems to be related to a plugin version conflict with omni.physx.fabric.

Here’s the error log:

[9,106ms] [Error] [carb] Interface: [omni::physx::IPhysxPrivate v0.2] requested but default plugin [omni::physx::IPhysxPrivate v1.2] cannot provide requested version
[9,107ms] [Error] [carb] [Plugin: omni.physx.fabric.plugin] Dependency: [omni::physx::IPhysxPrivate v0.2] failed to be resolved.
...
RuntimeError: Failed to acquire interface: omni::physx::IPhysxFabric (pluginName: nullptr)

From what I can tell, there is a version mismatch: the system is requesting omni::physx::IPhysxPrivate v0.2, but the loaded plugin provides version v1.2. This is preventing the omni.physx.fabric.plugin from starting up properly.

I’ve tried reinstalling and updating all related packages, but the problem persists. I’m using the latest version of Isaac Lab (4.5) and Python 3.10.

Has anyone else encountered this issue? Any advice on how to resolve this or work around the plugin version mismatch?

Thanks in advance for your help!

Yes, I have the same error too. Currently I don’t know how to fix it.

Same problem , Plz help us!!!