Return codes

These return codes are possible:
 0
Normal completion. User is disconnected from workstation.
 8
User is trying to disconnect from workstation, but there is no current connection.
10
User is trying to disconnect from GUI mode, but is connected with GUISCRD or GUISCRW values that are different than the host emulator session. User is not disconnected.
12
User is trying to disconnect from a GUI display when running BATCH GUI mode. User is not disconnected.
14
User is trying to disconnect from workstation while running the Workstation Tool Integration Configuration Program. User is not disconnected.