it was failing with something very verbose:
```
File "\blenderbim\bim\module\project\operator.py", line 1239, in execute
db = ifcpatch.execute(
^^^^^^^^^^^^^^^^^
File "\blenderbim\libs\site\packages\ifcpatch\__init__.py", line 80, in execute
patcher.patch()
File "\blenderbim\libs\site\packages\ifcpatch\recipes\ExtractPropertiesToSQLite.py", line 137, in patch
properties.append([i, "IFC Material", f"Layer {idx + 1} Name", item.Name])
^^^^^^^^^
File "\blenderbim\libs\site\packages\ifcopenshell\entity_instance.py", line 197, in __getattr__
raise AttributeError(
AttributeError: entity instance of type 'IFC2X3.IfcMaterialLayer' has no attribute 'Name'
Error: Python: Traceback (most recent call last):
File "\blenderbim\bim\module\project\operator.py", line 1239, in execute
db = ifcpatch.execute(
^^^^^^^^^^^^^^^^^
File "\blenderbim\libs\site\packages\ifcpatch\__init__.py", line 80, in execute
patcher.patch()
File "\blenderbim\libs\site\packages\ifcpatch\recipes\ExtractPropertiesToSQLite.py", line 137, in patch
properties.append([i, "IFC Material", f"Layer {idx + 1} Name", item.Name])
^^^^^^^^^
File "\blenderbim\libs\site\packages\ifcopenshell\entity_instance.py", line 197, in __getattr__
raise AttributeError(
AttributeError: entity inTraceback (most recent call last):
File "\Temp\tmpdggt3syt.py", line 9, in <module>
run()
File "\Temp\tmpdggt3syt.py", line 5, in run
bpy.ops.bim.load_linked_project(filepath="/Dormitory-ARC.ifc", false_origin="0,0,0")
File "\Blender\4.1\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 "\blenderbim\bim\module\project\operator.py", line 1239, in execute
db = ifcpatch.execute(
^^^^^^^^^^^^^^^^^
File "\blenderbim\libs\site\packages\ifcpatch\__init__.py", line 80, in execute
patcher.patch()
File "\blenderbim\libs\site\packages\ifcpatch\recipes\ExtractPropertiesToSQLite.py", line 137, in patch
properties.append([i, "IFC Material", f"Layer {idx + 1} Name", item.Name])
^^^^^^^^^
File "\blenderbim\libs\site\packages\ifcopenshell\entity_instance.py", line 197, in __getattr__
raise AttributeError(
AttributeError: entity instance of type 'IFC2X3.IfcMaterialLayer' has no attribute 'Name'
Location: \Blender\4.1\scripts\modules\bpy\ops.py:109
... truncatedUnregistered Snippets Library
BMAX Connector - UnRegistred!
An error occurred while processing your IFC.
Traceback (most recent call last):
File "\blenderbim\bim\module\project\operator.py", line 949, in execute
self.link_ifc()
File "\blenderbim\bim\module\project\operator.py", line 991, in link_ifc
self.link_blend(blend_filepath)
File "\blenderbim\bim\module\project\operator.py", line 953, in link_blend
with bpy.data.libraries.load(filepath, link=True) as (data_from, data_to):
OSError: load: \Dormitory-ARC.ifc.cache.blend failed to open blend file
Error: Python: Traceback (most recent call last):
File "\blenderbim\bim\module\project\operator.py", line 949, in execute
self.link_ifc()
File "\blenderbim\bim\module\project\operator.py", line 991, in link_ifc
self.link_blend(blend_filepath)
File "\blenderbim\bim\module\project\operator.py", line 953, in link_blend
with bpy.data.libraries.load(filepath, link=True) as (data_from, data_to):
OSError: load: \Dormitory-ARC.ifc.cache.blend failed to open blend file
Location: \Blender\4.1\scripts\modules\bpy\ops.py:109
Traceback (most recent call last):
File "\blenderbim\bim\module\project\operator.py", line 870, in execute
bpy.ops.bim.load_link(filepath=filepath, false_origin=self.false_origin)
File "\Blender\4.1\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 "\blenderbim\bim\module\project\operator.py", line 949, in execute
self.link_ifc()
File "\blenderbim\bim\module\project\operator.py", line 991, in link_ifc
self.link_blend(blend_filepath)
File "\blenderbim\bim\module\project\operator.py", line 953, in link_blend
with bpy.data.libraries.load(filepath, link=True) as (data_from, data_to):
OSError: load: \Dormitory-ARC.ifc.cache.blend failed to open blend file
Location: \Blender\4.1\scripts\modules\bpy\ops.py:109
```
it was clearing all other blender materials - e.g. blender materials associated with representation items styles. Also had the same issue with affecting extra elements as with unassigning materials
When you would unassign material (e.g. implicitly by removing the object), it might have also removed materials slots from other occurrences of the same type.
Which may had some unexpected sideffects later on - as unassigned styles saving IFC project (BBIM unassigned styles based on a assumption that it was the user decision to remove the materials and related styles).
previously every operation that would try to create owner history would fail with the error below if there wasn't IfcPersonAndOrganisation in the project.
Andrej730
