Bonsai | Cant Open and Read the IFC file :(
Hi all,
When I open the IFC File, no geometry is read, the error msg is
os: Windows
os_version: 10.0.19044
python_version: 3.11.7
architecture: ('64bit', 'WindowsPE')
machine: AMD64
processor: Intel64 Family 6 Model 165 Stepping 3, GenuineIntel
blender_version: 4.2.5 LTS
bonsai_version: 0.8.3-alpha250613
bonsai_commit_hash: 9b8357c
bonsai_commit_date: 2025-06-13T19:33:30+05:00
last_actions:
last_error: Traceback (most recent call last):
File "C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender\4.2\extensions\.local\lib\python3.11\site-packages\bonsai\bim\module\project\operator.py", line 1004, in finish_loading_project
bpy.ops.bim.load_project_elements()
File "C:\Program Files\Blender Foundation\Blender 4.2\4.2\scripts\modules\bpy\ops.py", line 109, in __call__
ret = _op_call(self.idname_py(), kw)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
RuntimeError: Error: Python: Traceback (most recent call last):
File "C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender\4.2\extensions\.local\lib\python3.11\site-packages\bonsai\bim\module\project\operator.py", line 1093, in execute
ifc_importer.execute()
File "C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender\4.2\extensions\.local\lib\python3.11\site-packages\bonsai\bim\import_ifc.py", line 267, in execute
self.parse_native_elements()
File "C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender\4.2\extensions\.local\lib\python3.11\site-packages\bonsai\bim\import_ifc.py", line 399, in parse_native_elements
if self.is_native(element):
^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender\4.2\extensions\.local\lib\python3.11\site-packages\bonsai\bim\import_ifc.py", line 433, in is_native
rep_matrix = ifcopenshell.util.placement.get_mappeditem_transformation(rep.Items[0])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender\4.2\extensions\.local\lib\python3.11\site-packages\ifcopenshell\util\placement.py", line 190, in get_mappeditem_transformation
m4 = get_axis2placement(item.MappingSource.MappingOrigin)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'MappingOrigin'
Location: C:\Program Files\Blender Foundation\Blender 4.2\4.2\scripts\modules\bpy\ops.py:109
ifc: Sreekesh.ifc
schema: IFC4X3
preprocessor_version: IfcOpenShell 0.8.3-alpha250613
originating_system: Bonsai 0.8.3-alpha250613-9b8357c
The github repository
https://github.com/Arunarchitect/SreekeshIFC
Comments
@arunarchitect
I loaded it without geometries to check its spatial decomposition and looks like there are some errors
a site in a storey or a road (name = Site) in a storey is not an accepted decomposition I think
it might be the cause probably
How did you load it without geometry?
How to correct this?
uncheck "Load Geometry" when this panel pops up
need to study it.. ;)
The file somehow opens in BIMVision. Also the previous commit of branch 'final' is also openable in Bonsai. Confused how to correct the file, Now I am planning to redo the works starting from the previous commit.
I don't know if it may help, I split the model into storey with the Quality and Coordination > Patch
SplitByBuildingStoreyand it returned the following separate models:only the first "0-GF.ifc" returned an error on opening it
I did the checkout to previous commit and opened it , in that I corrected the Site spatial structure like this,
I deleted the aggregate decorator after selecrting the site geometry, (dont know the concept), and then the Site detached from the GF when I reopened the file after saving.
Then I appended the elements and types one by one from the corrupted file and while doing it I got error only when importing the IfcPipeSegment class, got this error,
"Python: Traceback (most recent call last):
File "C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender\4.2\extensions.local\lib\python3.11\site-packages\bonsai\bim\ifc.py", line 488, in execute_ifc_operator
result = getattr(operator, "_execute")(context)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender\4.2\extensions.local\lib\python3.11\site-packages\bonsai\bim\module\project\operator.py", line 535, in _execute
bpy.ops.bim.append_library_element(definition=element.id())
File "C:\Program Files\Blender Foundation\Blender 4.2\4.2\scripts\modules\bpy\ops.py", line 109, in call
ret = _op_call(self.idname_py(), kw)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
RuntimeError: Error: Python: Traceback (most recent call last):
File "C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender\4.2\extensions.local\lib\python3.11\site-packages\bonsai\bim\ifc.py", line 488, in execute_ifc_operator
result = getattr(operator, "_execute")(context)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender\4.2\extensions.local\lib\python3.11\site-packages\bonsai\bim\module\project\operator.py", line 575, in _execute
element = ifcopenshell.api.project.append_asset(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender\4.2\extensions.local\lib\python3.11\site-packages\ifcopenshell\api__init__.py", line 255, in wrapper
result = usecase(*args, **settings)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender\4.2\extensions.local\lib\python3.11\site-packages\ifcopenshell\api\project\append_asset.py", line 142, in append_asset
return usecase.execute()
^^^^^^^^^^^^^^^^^
File "C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender\4.2\extensions.local\lib\python3.11\site-packages\ifcopenshell\api\project\append_asset.py", line 224, in execute
return self.append_product()
^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender\4.2\extensions.local\lib\python3.11\site-packages\ifcopenshell\api\project\append_asset.py", line 350, in append_product
with SafeRemovalContext(self.file, self.reuse_identities, self.assume_asset_uniqueness_by_name):
File "C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender\4.2\extensions.local\lib\python3.11\site-packages\ifcopenshell\api\project\append_asset.py", line 186, in __exit__
assert len(removed_identities) == len(removed_elements)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError
Location: C:\Program Files\Blender Foundation\Blender 4.2\4.2\scripts\modules\bpy\ops.py:109
"
-----apart from that , somehow corrected the file
Learned a lesson to git commit after smaller intervals to avoid more data corruption. Thanks @steverugi
i would also recommend constantly syncing files, via dropbox, or similar.