Known Issues & Troubleshooting

🤔 Known Issues

How can I parallelize running multiple scenes in OmniGibson?

Currently, to run multiple scenes in parallel, you will need to launch separate instances of the OmniGibson environment. While this introduces some overhead due to running multiple instances of IsaacSim, we are actively working on implementing parallelization capabilities. Our goal is to enable running multiple scenes within a single instance, streamlining the process and reducing the associated overhead.

Why does my particle system behave unexpectedly after clearing the scene?

If you clear a particle system and immediately re-initialize it without performing a physics step in between, you may observe unexpected behavior. Our assumption is that this occurs because some internal state variables aren't properly reset during the clearing process.

Solution: Take a physics step after clearing the particle system but before re-initializing it:

env.scene.clear_system(system_name)
og.sim.step()
system = env.scene.get_system(system_name) # Now safe to re-initialize

Best Practice: In most scenarios, completely clearing a particle system is unnecessary. Instead, consider: - Removing particles with system.remove_all_particles() or system.remove_particles(...) - Generating new particles with system.generate_particles(...)

🧯 Troubleshooting

I cannot open Omniverse Launcher AppImage on Linux

You probably need to install FUSE to run the Omniverse Launcher AppImage.

OmniGibson is stuck at HydraEngine rtx failed creating scene renderer.

OmniGibson is likely using an unsupported GPU (default is id 0). Run nvidia-smi to see the active list of GPUs, and select an NVIDIA-supported GPU and set its corresponding ID when running OmniGibson with export OMNIGIBSON_GPU_ID=<ID NUMBER>.