diff --git a/src/blenderbim/blenderbim/bim/module/resource/data.py b/src/blenderbim/blenderbim/bim/module/resource/data.py
index 47292fa3ab..d21154c33f 100644
--- a/src/blenderbim/blenderbim/bim/module/resource/data.py
+++ b/src/blenderbim/blenderbim/bim/module/resource/data.py
@@ -29,7 +29,6 @@ def refresh():
 class ResourceData:
     data = {}
     is_loaded = False
-    cost_values = {}
 
     @classmethod
     def load(cls):
diff --git a/src/blenderbim/blenderbim/bim/module/resource/operator.py b/src/blenderbim/blenderbim/bim/module/resource/operator.py
index 08f65c2e2e..9024d82077 100644
--- a/src/blenderbim/blenderbim/bim/module/resource/operator.py
+++ b/src/blenderbim/blenderbim/bim/module/resource/operator.py
@@ -128,9 +128,9 @@ class ContractResource(bpy.types.Operator):
 class AssignResource(bpy.types.Operator, tool.Ifc.Operator):
     bl_idname = "bim.assign_resource"
     bl_label = "Assign Resource"
+    bl_description = "Assign resource to the selected objects"
     bl_options = {"REGISTER", "UNDO"}
     resource: bpy.props.IntProperty()
-    related_object: bpy.props.StringProperty()
 
     def _execute(self, context):
         core.assign_resource(tool.Ifc, tool.Spatial, resource=tool.Ifc.get().by_id(self.resource))
@@ -139,9 +139,9 @@ class AssignResource(bpy.types.Operator, tool.Ifc.Operator):
 class UnassignResource(bpy.types.Operator, tool.Ifc.Operator):
     bl_idname = "bim.unassign_resource"
     bl_label = "Unassign Resource"
+    bl_description = "Unassign resource from the selected objects"
     bl_options = {"REGISTER", "UNDO"}
     resource: bpy.props.IntProperty()
-    related_object: bpy.props.StringProperty()
 
     def _execute(self, context):
         core.unassign_resource(tool.Ifc, tool.Spatial, resource=tool.Ifc.get().by_id(self.resource))