Python error loading fbx file in new project #105045
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Reference: blender/blender-addons#105045
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System Information
Operating system: Windows-10-10.0.22621-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3060 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 531.29
Blender Version
Broken: version: 4.0.2, branch: blender-v4.0-release, commit date: 2023-12-05 07:41, hash:
9be62e85b727Worked: (newest version of Blender that worked as expected)
Addon Information
Name: FBX format (5, 8, 13)
Author: Campbell Barton, Bastien Montagne, Jens Restemeier, @Mysteryem
Short description of error
A certain FBX file that could be imported in Blender a while ago will generate a Python error after import.
I did not change the content of any FBX file, so the sudden inability to import the file left me very confused.
I tried versions 3.6 and alpha but still couldn't import the fbx file correctly.
Exact steps for others to reproduce the error
Create a new project and import the fbx file from the attachment.
Error feedback in the console:
Python: Traceback (most recent call last):
File "F:\SteamLibrary\steamapps\common\Blender\4.0\scripts\addons\io_scene_fbx_init_.py", line 209, in execute
if import_fbx.load(self, context, filepath=path, **keywords) == {'FINISHED'}:
File "F:\SteamLibrary\steamapps\common\Blender\4.0\scripts\addons\io_scene_fbx\import_fbx.py", line 3464, in load
_(); del _
File "F:\SteamLibrary\steamapps\common\Blender\4.0\scripts\addons\io_scene_fbx\import_fbx.py", line 3458, in _
root_helper.build_hierarchy(fbx_tmpl, settings, scene, view_layer)
File "F:\SteamLibrary\steamapps\common\Blender\4.0\scripts\addons\io_scene_fbx\import_fbx.py", line 2889, in build_hierarchy
child.build_hierarchy(fbx_tmpl, settings, scene, view_layer)
File "F:\SteamLibrary\steamapps\common\Blender\4.0\scripts\addons\io_scene_fbx\import_fbx.py", line 2880, in build_hierarchy
child.build_hierarchy(fbx_tmpl, settings, scene, view_layer)
File "F:\SteamLibrary\steamapps\common\Blender\4.0\scripts\addons\io_scene_fbx\import_fbx.py", line 2880, in build_hierarchy
child.build_hierarchy(fbx_tmpl, settings, scene, view_layer)
File "F:\SteamLibrary\steamapps\common\Blender\4.0\scripts\addons\io_scene_fbx\import_fbx.py", line 2880, in build_hierarchy
child.build_hierarchy(fbx_tmpl, settings, scene, view_layer)
[Previous line repeated 5 more times]
File "F:\SteamLibrary\steamapps\common\Blender\4.0\scripts\addons\io_scene_fbx\import_fbx.py", line 2866, in build_hierarchy
child.set_pose_matrix_and_custom_props(self, settings)
File "F:\SteamLibrary\steamapps\common\Blender\4.0\scripts\addons\io_scene_fbx\import_fbx.py", line 2752, in set_pose_matrix_and_custom_props
child.set_pose_matrix_and_custom_props(arm, settings)
File "F:\SteamLibrary\steamapps\common\Blender\4.0\scripts\addons\io_scene_fbx\import_fbx.py", line 2752, in set_pose_matrix_and_custom_props
child.set_pose_matrix_and_custom_props(arm, settings)
File "F:\SteamLibrary\steamapps\common\Blender\4.0\scripts\addons\io_scene_fbx\import_fbx.py", line 2752, in set_pose_matrix_and_custom_props
child.set_pose_matrix_and_custom_props(arm, settings)
File "F:\SteamLibrary\steamapps\common\Blender\4.0\scripts\addons\io_scene_fbx\import_fbx.py", line 2746, in set_pose_matrix_and_custom_props
blen_read_custom_properties(self.fbx_elem, pose_bone, settings)
File "F:\SteamLibrary\steamapps\common\Blender\4.0\scripts\addons\io_scene_fbx\import_fbx.py", line 319, in blen_read_custom_properties
fbx_obj_props = elem_find_first(fbx_obj, b'Properties70')
File "F:\SteamLibrary\steamapps\common\Blender\4.0\scripts\addons\io_scene_fbx\import_fbx.py", line 84, in elem_find_first
for fbx_item in elem.elems:
AttributeError: 'NoneType' object has no attribute 'elems'
I can confirm. It's caused by
716702b97e, but that change might have identified an issue elsewhere with the attached file because the importer appears to have created bones forNurbsCurvemodels (a geometry type not supported by FBX IO). If that is correct behaviour in this case, thefbx_elemof the bones has not been set to theNurbsCurvemodel, so it tries to read the PoseBone custom properties fromNone.A simple fix would be to check that
fbx_elemis notNonebefore trying to read custom properties from it, but I'm not currently sure if it should beNonein the first place.A workaround for now to import this .fbx is to disable the import of Custom Properties when importing:
Thank you very much. This has solved all my problems