When replacing a style on an item whose previous IfcStyledItem wraps its styles
in the deprecated IfcPresentationStyleAssignment, and the assignment is not
being reused (use_style_assignment is False, e.g. an IFC4 file authored by
AVEVA E3D), the else branch called remove_same_type_styles(style_assignment)
with style_assignment still None, raising
AttributeError: 'NoneType' object has no attribute 'Styles'. Operate on style_,
the assignment found in the current iteration, instead of the accumulator.
Verified red-green with a minimal IFC4 file using IfcPresentationStyleAssignment.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
as probably in the most cases user would want 1 style per 1 representation item
After this it's finally possible in BBIM to assign styles to representation items through the materials: https://imgur.com/a/cgiJ1KV
Petru Conduraru