See #5491. Clean up orphaned meshes when editing.

src/bonsai/bonsai/bim/module/geometry/prop.py

@@ -63,7 +63,10 @@ def update_mode(self, context):
 def update_representation_obj(self, context):
     for item_obj in self.item_objs:
         if item_obj.obj:
+            data = item_obj.obj.data
             bpy.data.objects.remove(item_obj.obj)
+            if data and not data.users:
+                bpy.data.meshes.remove(data)
     self.item_objs.clear()
 
 

src/bonsai/bonsai/tool/model.py

@@ -281,7 +281,10 @@ class Model(bonsai.core.tool.Model):
         if obj is None:
             obj = bpy.data.objects.new("Profile", mesh)
         else:
+            old_data = obj.data
             obj.data = mesh
+            if old_data and not old_data.users:
+                bpy.data.meshes.remove(old_data)
 
         for arc in cls.arcs:
             group = obj.vertex_groups.new(name="IFCARCINDEX")