A standalone session is a session that is not nested in a batch. If a standalone session fails, you can run recovery using a menu command or pmcmd. These options are not available for batched sessions.
To recover sessions using the menu:
In the Server Manager, highlight the session you want to recover.
Select Server Requests-Stop from the menu.
With the failed session highlighted, select Server Requests-Start Session in Recovery Mode from the menu.
To recover sessions using pmcmd:
From the command line, stop the session.
From the command line, start recovery.