Hi @ombudsthom
It seems to be there is a problem with the omni.kit.imported.cad extension in Isaac Sim 2022.1.0 docker version during loading. That is why the red warning symbol. The error comes from the libfontconfig library
2022-08-28 17:01:31 [13,348ms] [Error] [carb] [Plugin: libomni.kit.importer.cad.plugin.so] Could not load the dynamic library from /isaac-sim/exts/omni.kit.importer.cad-0.3.1+lx64.r.cp37/bin/libomni.kit.
importer.cad.plugin.so. Error: libfontconfig.so.1: cannot open shared object file: No such file or directory
2022-08-28 17:01:31 [13,348ms] [Warning] [carb] Potential plugin preload failed: /isaac-sim/exts/omni.kit.importer.cad-0.3.1+lx64.r.cp37/bin/libomni.kit.importer.cad.plugin.so
2022-08-28 17:01:31 [13,348ms] [Error] [omni.ext.plugin] [ext: omni.kit.importer.cad-0.3.1] failed to load native plugin: /isaac-sim/exts/omni.kit.importer.cad-0.3.1+lx64.r.cp37/bin/libomni.kit.importer.
cad.plugin.so
2022-08-28 17:01:31 [13,359ms] [Error] [carb.scripting-python.plugin] RuntimeError: Failed to acquire interface: omni::isaac::cad_importer::CadImporter (pluginName: nullptr)
At:
/isaac-sim/exts/omni.kit.importer.cad-0.3.1+lx64.r.cp37/omni/kit/importer/cad/scripts/cad_importer_helper.py(29): __init__
/isaac-sim/exts/omni.kit.importer.cad-0.3.1+lx64.r.cp37/omni/kit/importer/cad/scripts/extension.py(46): on_startup
/isaac-sim/kit/plugins/bindings-python/omni/ext/impl/_internal.py(135): _startup_ext
/isaac-sim/kit/plugins/bindings-python/carb/profiler/__init__.py(80): wrapper
/isaac-sim/kit/plugins/bindings-python/omni/ext/impl/_internal.py(186): startup
/isaac-sim/kit/plugins/bindings-python/omni/ext/impl/_internal.py(268): startup_extension
PythonExtension.cpp::startup()(2): <module>
To solve it just install the libfontconfig as follow:
apt-get install libfontconfig
After that, the extension will load correctly and the .STEP will appear on File > Import menu
Note: If you have problems with apt-get inside docker, please, check this post: Isaac Sim container 2022.1.0 problem with "urm.nvidia.com" when launching "./run_all_tests.sh" - #2 by Sheikh_Dawood