Fix error messages when using the search operator on blank file (F3)

src/blenderbim/blenderbim/bim/module/bcf/operator.py

@@ -768,6 +768,8 @@ class ActivateBcfViewpoint(bpy.types.Operator):
         bcfxml = bcfstore.BcfStore.get_bcfxml()
         props = context.scene.BCFProperties
         blender_topic = props.active_topic
+        if blender_topic is None:
+            return False
         topic = bcfxml.topics[blender_topic.name]
         return topic.viewpoints
 

src/blenderbim/blenderbim/bim/module/bcf/prop.py

@@ -95,7 +95,7 @@ def getBcfViewpoints(self, context, force_update=False):
         props = context.scene.BCFProperties
         bcfxml = bcfstore.BcfStore.get_bcfxml()
         topic = props.active_topic
-        viewpoints = bcfxml.get_viewpoints(topic.name)
+        viewpoints = bcfxml.get_viewpoints(topic.name) if topic else {}
         bcfviewpoints_enum.extend([(v, f"Viewpoint {i+1}", "") for i, v in enumerate(viewpoints.keys())])
     return bcfviewpoints_enum
 

src/blenderbim/blenderbim/bim/module/geometry/operator.py

@@ -132,7 +132,7 @@ class UpdateRepresentation(bpy.types.Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.active_object.mode == "OBJECT"
+        return context.active_object and context.active_object.mode == "OBJECT"
 
     def execute(self, context):
         return IfcStore.execute_ifc_operator(self, context)
@@ -240,7 +240,7 @@ class UpdateParametricRepresentation(bpy.types.Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.active_object.mode == "OBJECT"
+        return context.active_object and context.active_object.mode == "OBJECT"
 
     def execute(self, context):
         self.file = IfcStore.get_file()