In SPD Server, you can
submit operator commands to a user after selecting the user with the
SET USER or SET USER/RECORD command. However, user sessions are finite.
The user that you select with SET USER or SET USER/RECORD might be
unavailable when the user ends the SAS session, or disconnects from
a LIBNAME and the user proxy. If you submit an OPER command to a user
that is no longer in session, or to a user that has ended a locking
user proxy, you get the following message:
ERROR: Specified locking user no longer exists.
If the disconnected
user used a non-locking user proxy, and you submit an OPER command,
you get the following message:
ERROR: Specified user <userID> with pid <Process-ID> no longer exists.
Either of these messages
indicates that the user that was selected is no longer valid. In this
case, you must use SET USER or SET USER/RECORD to select a different
user.