This situation can occur if the cleanup group for the destination wall does not allow objects from walls assigned to other cleanup groups to be copied to this wall. This design rule is intended to prevent placing objects in walls, such as cubicle partitions, that should not have objects added to them.
You can address this situation in 2 ways:
- Turn off this design rule in the cleanup group definition.
- Temporarily assign the walls to the same cleanup group, copy or move the objects, and then reassign the walls to their correct cleanup groups.