Import issue: not able to import STEP file using Isaac Sim 4.2.0

Omniverse Isaac Sim
1

Hi there,
i am not able to import any STEP file in isaac sim 4.2.0 via File–>Import. There is no mesh imported to stage and after trying to import the following messages appear, but the same error occurs even after reopening isaac sim and omiverse launcher.

message
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I have tested to import several STEP file i could import in previous (2023.1.1) isaac sim version without any problems and always had the same issue.

(The CAD Importer extension is enabled. v202.2.1)

any idea what to do ?

2

How did you obtain version 202.2.1? Have you tried using other versions? Could you provide detailed steps to reproduce this issue and share the STEP file?

4

CAD Converter version 201.2.1 is the latest public version.

Those messages have to do with RTX render settings and would only apply to transparent materials.

Can you please provide the STEP file that is not converting geometry?

Do all STEP files you try to convert have this issue, or is this only a specific file?

Additionally, could you please provide the kit log file, perhaps there are warnings or errors in the log file that will give us more insights.

5

sorry my mistake. of course it’s CAD Converter version 201.2.1.
i had that problem with every STEP file i tried to convert, including the STEP files from

used in this tutorial https://www.youtube.com/watch?v=pxPFr58gHmQ .

For importing i did the following steps:
File → Import
i selected the STEP file
then i selected Convert visible only, generate projection UV’s , enable instancing
and import to stage

where can i find the specific kit log file you need?

6

Okay I tested with that specific file but I am unable to reproduce the issue.

image
image2113×1207 350 KB

Could you please send you log file and try one debug procedure?

Ensure no conflicts from old versions:

  1. Open Window → Extension Manager

  2. Select options menu → Settings

    image
    image339×186 5.79 KB

  3. Scroll down to Extension System Cache, Click Open button.
    image

  4. Ensure that only the new versions of these three extensions are present. If others have the same extension name but different versions, please delete the older versions. This is a cache folder, and it’s possible that the old versions were not cleaned from the cache during the update to the latest CAD Converter extensions.

  • omni.kit.converter.hoops-500.0.26+106.1.0
  • omni.kit.converter.cad-201.2.1+106.1.0
  • omni.kit.asset_converter-2.1.23+wx64.r.cp310

image

7

Thanks.
Here is the log file:
kit_20241028_165754.log (1.2 MB)

I’m using isaac sim on linux by the way.

9

@feneu005
We have been able to reproduce the issue you have reported. We apologize for the inconvenience this has caused you and everyone in the community.
To resolve the problem, please follow these process steps. Could you please try them and report back?

  1. Disable all the loaded CAD converter extensions:
  • omni.kit.converter.cad
  • omni.kit.converter.common
  1. Install / Update to CAD CONVERTER 201.2.1 and the 500.0.26 extensions released with CC 201.2.1 (keep Disabled), and select “Autoload.”
  • omni.kit.converter.cad = 201.2.1
  • omni.kit.converter.common = 500.0.26
  • omni.kit.converter.hoops_core = 500.0.26
  • omni.kit.converter.dgn_core = 500.0.26
  • omni.kit.converter.jt_core = 500.0.26
  • omni.kit.converter.hoops = 500.0.26
  • omni.kit.converter.dgn = 500.0.26
  • omni.kit.converter.jt = 500.0.26
  1. Close and re-open Isaac Sim 4.2.0.

Extensions should now Autoload all of the correct versions listed in step 2. The STEP files and other CAD formats should now convert to USD without errors on Linux systems.

10

Thank you @kecollins
i followed the steps and i am able to import the step files successfully, now. only one thing remains, i still got the same messages as in my first post, every time i import a file.

11

We have noted the annoyance of this popup message, but it can be ignored. For material MDL conversion, we change RTX render settings on the USD file, which sometimes requires the app session to be closed and restarted. However, this message always occurs even if you don’t have transparent materials. In a future release, we will address this user experience.

12

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