Hello, all, I met a problem when trying to stop and delete srm agent. what I did is below: $node leave-group $srm $group $ns detach-agent $node $srm $srm delete delete $srm however, the error is like: ns: _o187 send-session: invalid command name "_o187" while executing "_o187 send-session" This looks the session message is not stopped, how can I really stop it and delete the srm agent? thank you. Sencun