The user issuing the command does not have authority to connect to the shared memory segment. When the shared memory segment is created by the server, it will be owned by the effective uid of the server process (dsmserv). Only processes running under this uid or root will be allowed to connect to the segment (and thus to the server).
The session is rejected and processing stops.
Run the command under the uid of the processing running dsmserv, if possible. Otherwise contact your system administrator for further help.