Get the Marker's parentFrame's name not the path name in the connectee_name property of the Socket.
Get the Marker's parentFrame's name not the path name in the connectee_name property of the Socket.

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