fix delete material operator

myoualid · myoualid · commit 88f53f7931b7 · 2023-06-12T15:24:51.000+01:00
diff --git a/src/blenderbim/blenderbim/bim/module/material/operator.py b/src/blenderbim/blenderbim/bim/module/material/operator.py
@@ -250,7 +250,8 @@ def _execute(self, context):
             if element:
                 material = ifcopenshell.util.element.get_material(element, should_inherit=False)
                 inherited_material = ifcopenshell.util.element.get_material(element, should_inherit=True)
-                if "Usage" in material.is_a():
+                print(material, inherited_material)
+                if material and "Usage" in material.is_a():
                     element_type = ifcopenshell.util.element.get_type(element)
                     ifcopenshell.api.run("material.unassign_material", tool.Ifc.get(), product=element_type)
                 elif not material and inherited_material:
