Isaac Sim asset/environments/ asset window not loading (despite trying local asset packs)?

[rsonawane2002]

Isaac Sim Version

5.1.0
5.0.0
4.5.0
4.2.0
4.1.0
4.0.0
4.5.0
2023.1.1
2023.1.0-hotfix.1
Other (please specify):

Operating System

Ubuntu 24.04
Ubuntu 22.04
Ubuntu 20.04
Windows 11
Windows 10
Other (please specify):

GPU Information

• Model:
• Driver Version:

Topic Description

Detailed Description

When I follow the stops on “Quick Install → Isaac Sim Documentation” on the nvidia website to quick install isaac sim, and then try to create the scene/franka arm, I get “missing references” and the objects are added to the environment but red, and unavailaible to be accessed. Same thing when I enable the isaac sim assets folder in the content window, it takes super long to upload and I get this error below:

I also tried downloading the “robots and sensors”, “materials and props”, and “environments” asset pack from nvidias website to maybe load the assets locally, but even this didn’t work as there are many dependencies and the software seems to default to accessing that s3 bucket in omniverse and it doesnt end up working. Does anyone have any advice to fix this error?

Error Messages

Error message when I try to enable isaac sim assets:

2025-10-13T23:48:23Z [517,757ms] [Error] [omni.ui] Failed to upload UI Image ‘https : / / o mniverse- content-produc tion.s3-us-we st-2.amazona ws.com /Assets/Isaac/5.0/Isaac/Ro bots/Robotiq/2F-140/.thumbs/256x256/Robotiq_2F_140_physics_edit.usd.png’”

Error message when I try to go to create → environments → simple room:

”2025-10-14T00:01:37Z [82,130ms] [Warning] [omni.usd] Warning: in _ReportErrors at line 3172 of /builds/omniverse/usd-ci/USD/pxr/usd/usd/stage.cpp – In : Could not open asset @https://omniverse-content-production.s3-us-west-2.amazonaws.com/Assets/Isaac/5.0/Isaac/Environments/Simple_Room/simple_room.usd@ for reference introduced by @anon:0x71d2e80049a0:World0.usd@. (recomposing stage on stage @anon:0x71d2e80049a0:World0.usd@ <0x71d2e801d9c0>)

2025-10-14T00:02:29Z [134,564ms] [Error] [omni.usd.impl.utils] Failed to open crate file https :// omniverse -content-production.s3-us-west-2.amazonaws.com/Assets/Isaac/5.0/Isaac/Environments/Simple_Room/simple_ room. usd:
Error in 'pxrInternal_v0_24__pxrReserved_::Usd_CrateFile::CrateFile::Open’ at line 2185 in file /builds/omniverse/usd-ci/USD/pxr/usd/usd/crateFile.cpp : ‘Failed to open asset ‘https://omniverse-content-production.s3-us-west-2.amazonaws.com/Assets/Isaac/5.0/Isaac/Environments/Simple_Room/simple_room.usd’’”

Screenshots or Videos

The assets show “missing reference” after the above errors occur when I try to create them.

Additional Information

What I’ve Tried

Tried reinstalling the .sh files, tried using local assets instead of fetching them like this. Nothing seems to work.

Related Issues

(If you’re aware of any related issues or forum posts, please link them here)

Additional Context

(Add any other context about the problem here)

[Simplychenable]

@rsonawane2002 i am just another user, but it looks like the hub is not detected/present (at the top right of the app), could you try installing the hub by clicking on Hub Not Detected field to install and see if you are still seeing the same issue?

Unable to create/Robots/Nova Carter with Sensors

@howar845 Could you please try Isaac Sim 5.1.0 OSS we recently released on github and see if you observe the same issue? Also after you cleared the cache via Isaac Sim App Selector, did you check the hub folder? In Isaac Sim, cached USD assets are managed by the Omniverse Nucleus service, specifically through the “Hub” feature, and are stored locally on your machine. You can configure and find its location by checking the “CACHE” icon in the top-right corner of the application.

another way to confirm whether you have issues accessing the OV assets on the AWS, could you try clicking on the asset link and see if you are able to download it (this is the same path in your error messages):

https://omniverse-content-production.s3-us-west-2.amazonaws.com/Assets/Isaac/5.0/Isaac/Environments/Simple_Room/simple_room.usd

if you do have problem downloading it, i suspect it would be attributed to connectivity issue(s).

[rsonawane2002]

Hi, thanks for the reply. I tried installing the hub in the top right, but it says error path already exists (and when I rm -rf that cache path and try to reinstall and reboot, it says hub not detected again despite restarting).

As for your second point, when I access the link in my browser the correspond .usd file is downloaded to my PC (even if I use curl to get a response, I do get one). But when it tries to load from IsaacSim it doesn’t work for some reason. How can I isolate if this is a permissions (sudo) or wifi issue?

Also, do you recommend using omniverse/nucleus server? Do I need to have something running or installed to use assets? I read that omniverse is now deprecated so not sure on that front.

The main issue seems to be this:
”2025-10-14T17:28:35Z [243,454ms] [Warning] [omni.usd] Warning: in _ReportErrors at line 3172 of /builds/omniverse/usd-ci/USD/pxr/usd/usd/stage.cpp – In : Could not open asset @https://omniverse-content-production.s3-us-west-2.amazonaws.com/Assets/Isaac/5.0/Isaac/Environments/Simple_Room/simple_room.usd@ for reference introduced by @anon:0x7dd3f8019fc0:World0.usd@. (recomposing stage on stage @anon:0x7dd3f8019fc0:World0.usd@ <0x7dd3f8005120>)

2025-10-14T17:29:39Z [307,127ms] [Error] [omni.usd.impl.utils] Failed to open crate file https://omniverse-content-production.s3-us-west-2.amazonaws.com/Assets/Isaac/5.0/Isaac/Environments/Simple_Room/simple_room.usd:
Error in 'pxrInternal_v0_24__pxrReserved_::Usd_CrateFile::CrateFile::Open’ at line 2185 in file /builds/omniverse/usd-ci/USD/pxr/usd/usd/crateFile.cpp : ‘Failed to open asset ‘https://omniverse-content-production.s3-us-west-2.amazonaws.com/Assets/Isaac/5.0/Isaac/Environments/Simple_Room/simple_room.usd’’”

I tried a fresh reinstall as well, and I still get this error. Is it an issue with my local computer or wifi? Should I try to use brev instead.

[VickNV]

Have you tried using the official Local Assets Packs and following all steps in the Isaac Sim documentation’s “Assets” section? The process involves downloading the full local asset pack, merging all required pack files into one folder, and editing your configuration files so Isaac Sim reliably finds and indexes local assets instead of remote ones.

[VickNV]

Hello!

We noticed that this topic hasn’t received any recent responses, so we are closing it for now to help keep the forum organized.

If you’re still experiencing this issue or have additional questions, please feel free to create a new topic with updated details. When doing so, we recommend mentioning or linking to this original topic in your new post—this helps provide context and makes it easier for others to assist you.

Thank you for being part of the NVIDIA Isaac Sim community.

Best regards,
The NVIDIA Isaac Sim Forum Team