(Isaac sim 4.2.0, Windows 11, RTX 4060 Ti, driver 560.94) Sensor import issue
Hello! I’m trying to import a LiDAR sensor into a physics environment, but encountering this error in the extensions when searching for omni.isaac.sensor. I previously tried the same thing in 4.5.0, but the interactive window was unresponsive so I went down a version. Thank you in advance!
Hello,
First, Need to check whether ROS2 is installed on the host machine’s OS.
And Could you please copy & paste additional logs related to the error message and send them in your reply?
Usually, you can copy the messages directly from the console window.
Hi @nikpolyakov6 I tried on my side with Isaac Sim 4.2 and it works fine.
What is the error message in the log?
Hello - thank you for the response! Would I download ROS2 from this link- Installation — ROS 2 Documentation: Humble documentation or was it in the Isaac package? My isaac sim looks like this currently
Hello! I was able to find more documentation for 4.5.0 so I got further with it, but in 4.2.0 my error messages are the following:
2025-06-04 15:27:58 [42,182ms] [Error] [omni.ext._impl._internal] Failed to import python module omni.isaac.core from c:\users\nickp\downloads\isaacolder\exts\omni.isaac.core. Error: [WinError 126] The specified module could not be found. Error loading “c:/users/nickp/downloads/isaacolder/exts/omni.isaac.ml_archive/pip_prebundle/torch\lib\fbgemm.dll” or one of its dependencies.. Traceback:
Hi @nikpolyakov6 . Isaac Sim 4.5 is our latest stable version. Are you able to load the omni.isaac.sensor extension with Isaac Sim 4.5?
I just saw this notification now.
As others have mentioned, I also experienced issues where libraries like omni.isaac.sensor wouldn’t load properly. In such cases, could you also check whether the ROS2 bridge extension can be loaded? In most cases, it was because ROS2 wasn’t built on the host machine.
In my case, I’m using Isaac Sim 4.5 with ROS2 built into a Docker container. I’ll share a link for reference:
If needed, you can either install ROS2 on your host machine following the official Nvidia procedure,
or build it using the Dockerfile I’ve provided below:
I attempted to load the same setup on another computer with a built in Nvidia GPU and it works. I am currently using an eGPU connected through thunderbolt, is there another command I need to enter to make sure it runs? I attached the graphics table when loading isaac sim. Thank you!
That looks good to me. I don’t think there is extra command needed.
I realized the issue was with the thunderbolt connection so I made a new post addressing that directly. Thank you so much for the help!
