Cad Converter Failed to Import Python Module

pmkohler · December 20, 2023, 1:30pm

I am attempting to load the extension Cad Converter on a fresh install of isaac sim using the omniverse app image tool. After enabling the Cad Converter extension using the Window->Extensions pane I see an error in the pop-up terminal when you launch Isaac Sim:

The first seems to relate to Cad Converter Core:
2023-12-20 13:26:12 [5,164ms] [Error] [omni.ext._impl.custom_importer] Failed to import python module omni.kit.converter.cad_core. Error: cannot import name ‘strip_file_regex’ from ‘omni.kit.converter.common’ (/home/pkohler/.local/share/ov/pkg/isaac_sim-2023.1.1/extscache/omni.kit.converter.common-200.1.0-rc.4+105.1/omni/kit/converter/common/init.py). Traceback:
Traceback (most recent call last):
File “/home/pkohler/.local/share/ov/pkg/isaac_sim-2023.1.1/kit/kernel/py/omni/ext/_impl/custom_importer.py”, line 76, in import_module
return importlib.import_module(name)
File “/home/pkohler/.local/share/ov/pkg/isaac_sim-2023.1.1/kit/python/lib/python3.10/importlib/init.py”, line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File “”, line 1050, in _gcd_import
File “”, line 1027, in _find_and_load
File “”, line 1006, in _find_and_load_unlocked
File “”, line 688, in _load_unlocked
File “”, line 883, in exec_module
File “”, line 241, in _call_with_frames_removed
File “/home/pkohler/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad_core-200.1.1-rc.10+105.1.lx64.r.cp310/omni/kit/converter/cad_core/init.py”, line 6, in
from ._impl.extension import *
File “/home/pkohler/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad_core-200.1.1-rc.10+105.1.lx64.r.cp310/omni/kit/converter/cad_core/_impl/init.py”, line 1, in
from .extension import *
File “/home/pkohler/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad_core-200.1.1-rc.10+105.1.lx64.r.cp310/omni/kit/converter/cad_core/_impl/extension.py”, line 8, in
from .cad_converter_helper import CadConverterHelper
File “/home/pkohler/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad_core-200.1.1-rc.10+105.1.lx64.r.cp310/omni/kit/converter/cad_core/_impl/cad_converter_helper.py”, line 14, in
from omni.kit.converter.common import ConverterStatus, OmniClientWrapper, OmniUrl, strip_file_regex
ImportError: cannot import name ‘strip_file_regex’ from ‘omni.kit.converter.common’ (/home/pkohler/.local/share/ov/pkg/isaac_sim-2023.1.1/extscache/omni.kit.converter.common-200.1.0-rc.4+105.1/omni/kit/converter/common/init.py)

2023-12-20 13:26:12 [5,164ms] [Error] [carb.scripting-python.plugin] Exception: Extension python module: ‘omni.kit.converter.cad_core’ in ‘/home/pkohler/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad_core-200.1.1-rc.10+105.1.lx64.r.cp310’ failed to load.

At:
/home/pkohler/.local/share/ov/pkg/isaac_sim-2023.1.1/kit/kernel/py/omni/ext/_impl/_internal.py(213): startup
/home/pkohler/.local/share/ov/pkg/isaac_sim-2023.1.1/kit/kernel/py/omni/ext/_impl/_internal.py(328): startup_extension
PythonExtension.cpp::startup()(2):

2023-12-20 13:26:12 [5,164ms] [Error] [omni.ext.plugin] [ext: omni.kit.converter.cad_core-200.1.1-rc.10] Failed to startup python extension.

The second seems to relate to Cad Converter:
2023-12-20 13:26:13 [5,405ms] [Error] [omni.ext._impl.custom_importer] Failed to import python module omni.kit.converter.cad. Error: cannot import name ‘strip_file_regex’ from ‘omni.kit.converter.common’ (/home/pkohler/.local/share/ov/pkg/isaac_sim-2023.1.1/extscache/omni.kit.converter.common-200.1.0-rc.4+105.1/omni/kit/converter/common/init.py). Traceback:
Traceback (most recent call last):
File “/home/pkohler/.local/share/ov/pkg/isaac_sim-2023.1.1/kit/kernel/py/omni/ext/_impl/custom_importer.py”, line 76, in import_module
return importlib.import_module(name)
File “/home/pkohler/.local/share/ov/pkg/isaac_sim-2023.1.1/kit/python/lib/python3.10/importlib/init.py”, line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File “”, line 1050, in _gcd_import
File “”, line 1027, in _find_and_load
File “”, line 1006, in _find_and_load_unlocked
File “”, line 688, in _load_unlocked
File “”, line 883, in exec_module
File “”, line 241, in _call_with_frames_removed
File “/home/pkohler/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad-200.1.1-rc.8+105.1/omni/kit/converter/cad/init.py”, line 1, in
from .extension import *
File “/home/pkohler/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad-200.1.1-rc.8+105.1/omni/kit/converter/cad/extension.py”, line 6, in
from omni.kit.converter.cad_core import CAD_CORE_FILTER_DATA, DGN_CORE_FILTER_DATA
File “/home/pkohler/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad_core-200.1.1-rc.10+105.1.lx64.r.cp310/omni/kit/converter/cad_core/init.py”, line 6, in
from ._impl.extension import *
File “/home/pkohler/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad_core-200.1.1-rc.10+105.1.lx64.r.cp310/omni/kit/converter/cad_core/_impl/init.py”, line 1, in
from .extension import *
File “/home/pkohler/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad_core-200.1.1-rc.10+105.1.lx64.r.cp310/omni/kit/converter/cad_core/_impl/extension.py”, line 8, in
from .cad_converter_helper import CadConverterHelper
File “/home/pkohler/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad_core-200.1.1-rc.10+105.1.lx64.r.cp310/omni/kit/converter/cad_core/_impl/cad_converter_helper.py”, line 14, in
from omni.kit.converter.common import ConverterStatus, OmniClientWrapper, OmniUrl, strip_file_regex
ImportError: cannot import name ‘strip_file_regex’ from ‘omni.kit.converter.common’ (/home/pkohler/.local/share/ov/pkg/isaac_sim-2023.1.1/extscache/omni.kit.converter.common-200.1.0-rc.4+105.1/omni/kit/converter/common/init.py)

2023-12-20 13:26:13 [5,405ms] [Error] [carb.scripting-python.plugin] Exception: Extension python module: ‘omni.kit.converter.cad’ in ‘/home/pkohler/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad-200.1.1-rc.8+105.1’ failed to load.

At:
/home/pkohler/.local/share/ov/pkg/isaac_sim-2023.1.1/kit/kernel/py/omni/ext/_impl/_internal.py(213): startup
/home/pkohler/.local/share/ov/pkg/isaac_sim-2023.1.1/kit/kernel/py/omni/ext/_impl/_internal.py(328): startup_extension
PythonExtension.cpp::startup()(2):

2023-12-20 13:26:13 [5,405ms] [Error] [omni.ext.plugin] [ext: omni.kit.converter.cad-200.1.1-rc.8] Failed to startup python extension.

Any help on how to resolve this dependency issue would be thoroughly appreciated. If you need any more information please let me know.

Thank you!

pmkohler · December 22, 2023, 3:26pm

Bump! Any ideas? Should I try an older version of isaac sim?

rthaker · January 15, 2024, 5:14pm

I have forwarded this question to right PIC, he should be able to look into this and get back to you.

pkoprov · February 11, 2024, 7:53pm

I imported STEP file from Linux machine and it was ok. Then I found out that I can update the CAD importer and it failed to update. Here is the screenshot:

When I hover over red triangle it says "Failed to solve extension".
After this, I can’t import STEP files anymore. Looks like STEP importer fails: here is a piece of log while loading:

2024-02-11 19:51:02 [23,329ms] [Error] [omni.ext._impl.custom_importer] Failed to import python module omni.kit.converter.cad_core. Error: cannot import name 'strip_file_regex' from 'omni.kit.converter.common' (/home/pkoprov/.local/share/ov/pkg/isaac_sim-2023.1.1/extscache/omni.kit.converter.common-200.1.0-rc.4+105.1/omni/kit/converter/common/__init__.py). Traceback:
Traceback (most recent call last):
  File "/home/pkoprov/.local/share/ov/pkg/isaac_sim-2023.1.1/kit/kernel/py/omni/ext/_impl/custom_importer.py", line 76, in import_module
    return importlib.import_module(name)
  File "/home/pkoprov/.local/share/ov/pkg/isaac_sim-2023.1.1/kit/python/lib/python3.10/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 883, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/home/pkoprov/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad_core-200.1.1-rc.10+105.1.lx64.r.cp310/omni/kit/converter/cad_core/__init__.py", line 6, in <module>
    from ._impl.extension import *
  File "/home/pkoprov/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad_core-200.1.1-rc.10+105.1.lx64.r.cp310/omni/kit/converter/cad_core/_impl/__init__.py", line 1, in <module>
    from .extension import *
  File "/home/pkoprov/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad_core-200.1.1-rc.10+105.1.lx64.r.cp310/omni/kit/converter/cad_core/_impl/extension.py", line 8, in <module>
    from .cad_converter_helper import CadConverterHelper
  File "/home/pkoprov/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad_core-200.1.1-rc.10+105.1.lx64.r.cp310/omni/kit/converter/cad_core/_impl/cad_converter_helper.py", line 14, in <module>
    from omni.kit.converter.common import ConverterStatus, OmniClientWrapper, OmniUrl, strip_file_regex
ImportError: cannot import name 'strip_file_regex' from 'omni.kit.converter.common' (/home/pkoprov/.local/share/ov/pkg/isaac_sim-2023.1.1/extscache/omni.kit.converter.common-200.1.0-rc.4+105.1/omni/kit/converter/common/__init__.py)

2024-02-11 19:51:02 [23,329ms] [Error] [carb.scripting-python.plugin] Exception: Extension python module: 'omni.kit.converter.cad_core' in '/home/pkoprov/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad_core-200.1.1-rc.10+105.1.lx64.r.cp310' failed to load.

At:
  /home/pkoprov/.local/share/ov/pkg/isaac_sim-2023.1.1/kit/kernel/py/omni/ext/_impl/_internal.py(213): startup
  /home/pkoprov/.local/share/ov/pkg/isaac_sim-2023.1.1/kit/kernel/py/omni/ext/_impl/_internal.py(328): startup_extension
  PythonExtension.cpp::startup()(2): <module>

2024-02-11 19:51:02 [23,329ms] [Error] [omni.ext.plugin] [ext: omni.kit.converter.cad_core-200.1.1-rc.10] Failed to startup python extension.
[23.752s] [ext: semantics.schema.editor-0.3.4] startup
[23.756s] [ext: omni.kit.menu.common-1.1.4] startup
[23.759s] [ext: omni.kit.quicklayout-1.0.5] startup
[23.761s] [ext: omni.anim.retarget.ui-105.1.4] startup
[23.769s] [ext: omni.kit.window.title-1.1.3] startup
[23.771s] [ext: semantics.schema.property-1.0.2] startup
[23.774s] [ext: omni.kit.converter.cad-200.1.1-rc.8] startup
2024-02-11 19:51:02 [23,754ms] [Error] [omni.ext._impl.custom_importer] Failed to import python module omni.kit.converter.cad. Error: cannot import name 'strip_file_regex' from 'omni.kit.converter.common' (/home/pkoprov/.local/share/ov/pkg/isaac_sim-2023.1.1/extscache/omni.kit.converter.common-200.1.0-rc.4+105.1/omni/kit/converter/common/__init__.py). Traceback:
Traceback (most recent call last):
  File "/home/pkoprov/.local/share/ov/pkg/isaac_sim-2023.1.1/kit/kernel/py/omni/ext/_impl/custom_importer.py", line 76, in import_module
    return importlib.import_module(name)
  File "/home/pkoprov/.local/share/ov/pkg/isaac_sim-2023.1.1/kit/python/lib/python3.10/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 883, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/home/pkoprov/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad-200.1.1-rc.8+105.1/omni/kit/converter/cad/__init__.py", line 1, in <module>
    from .extension import *
  File "/home/pkoprov/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad-200.1.1-rc.8+105.1/omni/kit/converter/cad/extension.py", line 6, in <module>
    from omni.kit.converter.cad_core import CAD_CORE_FILTER_DATA, DGN_CORE_FILTER_DATA
  File "/home/pkoprov/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad_core-200.1.1-rc.10+105.1.lx64.r.cp310/omni/kit/converter/cad_core/__init__.py", line 6, in <module>
    from ._impl.extension import *
  File "/home/pkoprov/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad_core-200.1.1-rc.10+105.1.lx64.r.cp310/omni/kit/converter/cad_core/_impl/__init__.py", line 1, in <module>
    from .extension import *
  File "/home/pkoprov/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad_core-200.1.1-rc.10+105.1.lx64.r.cp310/omni/kit/converter/cad_core/_impl/extension.py", line 8, in <module>
    from .cad_converter_helper import CadConverterHelper
  File "/home/pkoprov/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad_core-200.1.1-rc.10+105.1.lx64.r.cp310/omni/kit/converter/cad_core/_impl/cad_converter_helper.py", line 14, in <module>
    from omni.kit.converter.common import ConverterStatus, OmniClientWrapper, OmniUrl, strip_file_regex
ImportError: cannot import name 'strip_file_regex' from 'omni.kit.converter.common' (/home/pkoprov/.local/share/ov/pkg/isaac_sim-2023.1.1/extscache/omni.kit.converter.common-200.1.0-rc.4+105.1/omni/kit/converter/common/__init__.py)

2024-02-11 19:51:02 [23,754ms] [Error] [carb.scripting-python.plugin] Exception: Extension python module: 'omni.kit.converter.cad' in '/home/pkoprov/.local/share/ov/data/Kit/Isaac-Sim/2023.1/exts/3/omni.kit.converter.cad-200.1.1-rc.8+105.1' failed to load.

At:
  /home/pkoprov/.local/share/ov/pkg/isaac_sim-2023.1.1/kit/kernel/py/omni/ext/_impl/_internal.py(213): startup
  /home/pkoprov/.local/share/ov/pkg/isaac_sim-2023.1.1/kit/kernel/py/omni/ext/_impl/_internal.py(328): startup_extension
  PythonExtension.cpp::startup()(2): <module>

2024-02-11 19:51:02 [23,754ms] [Error] [omni.ext.plugin] [ext: omni.kit.converter.cad-200.1.1-rc.8] Failed to startup python extension.
[24.180s] [ext: omni.kit.quicksearch.menu-0.8.7] startup
[24.183s] [ext: omni.isaac.occupancy_map-0.3.2] startup
[24.205s] [ext: omni.importer.mjcf-1.1.0] startup
[24.217s] [ext: omni.anim.retarget.bundle-105.1.1] startup
[24.221s] [ext: omni.isaac.app.setup-0.11.2] startup
2024-02-11 19:51:03 [24,200ms] [Warning] [omni.kit.app._impl] carb.imgui is deprecated. Use omni.kit.imgui instead.
[24.222s] Isaac Sim Version: 2023.1.1-rc.8
[24.223s] Writing Isaac Sim icon file
[24.226s] [ext: omni.kit.window.stats-0.1.4] startup
[24.228s] [ext: omni.isaac.assets_check-0.3.3] startup
[24.231s] [ext: omni.isaac.sim.base-2023.1.1] startup
[24.232s] [ext: omni.isaac.sim-2023.1.1] startup
2024-02-11 19:51:03 [24,285ms] [Warning] [omni.kit.hotkeys.core.registry] [Hotkey] duplicated action as SPACE (On Press) with omni.kit.widget.toolbar.omni.kit.widget.toolbar::toolbar::play!
2024-02-11 19:51:03 [24,285ms] [Warning] [omni.kit.hotkeys.core.registry] [Hotkey] Cannot register Global [omni.kit.widget.toolbar] omni.kit.widget.toolbar::toolbar::play.SPACE, error code: Duplicated action definition
[24.536s] app ready
2024-02-11 19:51:04 [25,112ms] [Warning] [omni.kit.hotkeys.core.registry] [Hotkey] duplicated action as SPACE (On Press) with omni.kit.widget.toolbar.omni.kit.widget.toolbar::toolbar::play!
2024-02-11 19:51:04 [25,112ms] [Warning] [omni.kit.hotkeys.core.registry] [Hotkey] Cannot register Global [omni.kit.widget.toolbar] omni.kit.widget.toolbar::toolbar::play.SPACE, error code: Duplicated action definition
[28.066s] RTX ready
[28.073s] Isaac Sim App is loaded.

I cannot even revert back.

tsosnoski · April 19, 2024, 12:35am

Did you ever figure out what the problem was?

pmkohler · April 19, 2024, 1:27am

No. I ended up using 2023.1.0-hotfix.1 and that has a working version of the CAD converter.

vova.nesin · April 24, 2024, 7:07pm

Were you able to look into solutions? I happened to get the same problem when tried to update the CAD Converter. Thanks!

vova.nesin · April 24, 2024, 8:49pm

This solved the issue for me.

Simplychenable · April 24, 2024, 9:05pm

this is good to know, thanks for circling back with a solution 👍

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