throw exception if PhysicalOffsetFrame is passed in as a PhysicalFrame
throw exception if PhysicalOffsetFrame is passed in as a PhysicalFrame

opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core