[Error] [isaacsim.ros2.bridge.scripts.extension] ROS2 Bridge startup failed

Omniverse Isaac Sim
1

[7.511s] Using backup internal ROS2 humble distro
Checking to see if RMW can be loaded:
failed to get symbol ‘rmw_init_options_init’ due to Environment variable ‘AMENT_PREFIX_PATH’ is not set or empty, at /workspace/humble_ws/src/rmw_implementation/src/functions.cpp:171, at /workspace/humble_ws/src/rcl/rcl/src/rcl/init_options.c:75
RMW was not loaded

[7.517s] To use the internal libraries included with the extension please set the following environment variables to use with FastDDS (default) or CycloneDDS (ROS2 Humble only):
RMW_IMPLEMENTATION=rmw_fastrtps_cpp
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/aruneshsrinivasan/Downloads/isaac-sim-standalone@4.5.0-rc.36+release.19112.f59b3005.gl.linux-x86_64.release/exts/isaacsim.ros2.bridge/humble/lib

OR

RMW_IMPLEMENTATION=rmw_cyclonedds_cpp
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/aruneshsrinivasan/Downloads/isaac-sim-standalone@4.5.0-rc.36+release.19112.f59b3005.gl.linux-x86_64.release/exts/isaacsim.ros2.bridge/humble/lib
Before starting Isaac Sim
2025-03-04 14:24:17 [7,493ms] [Error] [isaacsim.ros2.bridge.scripts.extension] ROS2 Bridge startup failed
[7.525s] [ext: isaacsim.ros2.bridge-4.1.15] shutdown
2025-03-04 14:24:17 [7,713ms] [Warning] [omni.ext._impl._internal] isaacsim.ros2.bridge-4.1.15 → <class ‘isaacsim.ros2.bridge.scripts.samples.ros_moveit_sample.Extension’>: extension object is still alive, something holds a reference on it. References: [“[0]:type: <class ‘method’>, id: 133169863867136”, “[1]:type: <class ‘method’>, id: 133169052228928”]
2025-03-04 14:24:17 [7,884ms] [Warning] [omni.ext._impl._internal] isaacsim.ros2.bridge-4.1.15 → <class ‘isaacsim.ros2.bridge.scripts.samples.ros_waypoint_follower_sample.Extension’>: extension object is still alive, something holds a reference on it. References: [“[0]:type: <class ‘method’>, id: 133169696913920”, “[1]:type: <class ‘method’>, id: 133169964900800”]
2025-03-04 14:24:17 [7,909ms] [Warning] [omni.ext._impl._internal] isaacsim.ros2.bridge-4.1.15 → <class ‘isaacsim.ros2.bridge.scripts.samples.ros_samples.Extension’>: extension object is still alive, something holds a reference on it. References: [“[0]:type: <class ‘method’>, id: 133169958510528”, “[1]:type: <class ‘method’>, id: 133168985901632”, “[2]:type: <class ‘method’>, id: 133169964901184”, “[3]:type: <class ‘method’>, id: 133168986228288”, “[4]:type: <class ‘method’>, id: 133169966643968”, ‘[*] …’]
[8.164s] [ext: omni.kit.registry.nucleus-0.0.0] startup
2025-03-04 14:24:18 [8,547ms] [Warning] [rtx.scenedb.plugin] SceneDbContext : TLAS limit buffer size 8448000128
2025-03-04 14:24:18 [8,547ms] [Warning] [rtx.scenedb.plugin] SceneDbContext : TLAS limit : valid false, within: false
2025-03-04 14:24:18 [8,547ms] [Warning] [rtx.scenedb.plugin] SceneDbContext : TLAS limit : decrement: 167690, decrement size: 8363520384
2025-03-04 14:24:18 [8,547ms] [Warning] [rtx.scenedb.plugin] SceneDbContext : New limit 8508328 (slope: 503, intercept: 13181056)
2025-03-04 14:24:18 [8,547ms] [Warning] [rtx.scenedb.plugin] SceneDbContext : TLAS limit buffer size 4286378240
2025-03-04 14:24:18 [8,547ms] [Warning] [rtx.scenedb.plugin] SceneDbContext : TLAS limit : valid true, within: true
2025-03-04 14:24:18 [8,694ms] [Warning] [omni.usd-abi.plugin] No setting was found for ‘/rtx-defaults-transient/meshlights/forceDisable’
[8.833s] app ready
2025-03-04 14:24:18 [8,810ms] [Warning] [omni.usd-abi.plugin] No setting was found for ‘/rtx-defaults/post/dlss/execMode’
[10.707s] Isaac Sim Full App is loaded.

I’m facing this issue and unable to enable the ROS2 extension in Isaac sim.
What should be done to resolve this?

2

Please carefully review the instructions in https://docs.omniverse.nvidia.com/isaacsim/4.5.0/installation/install_container.html.

It’s important to ensure all steps are followed precisely to avoid potential issues with the ROS2 bridge.

Additionally, you may check if Docker container: Isaac Sim - ROS2 Birdge startup failed is helpful.

3

@arunesh.srinivasan has this issue been resolved?

4

Hi, thanks for suggesting the workaround. But I don’t use docker container for my tasks. The interesting part is that, it was working completely fine until I updated my drivers to the compatibility of the 4.5.

I was able to resolve this error in another way. Instead of running the isaac-sim.sh directly in the terminal, it works when I run it as ‘bash isaac-sim.sh’.

I could think of the issue, but unable to come up with what’s causing it.

5

To further diagnose the issue, I recommend comparing the environment variables before and during Isaac Sim execution by comparing the outputs of env.

6

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