$RESTART
$RESTART is a reserved global symbol that the system maintains for you. $RESTART is true if one of your batch jobs was restarted after it was interrupted. Otherwise, $RESTART is false. You cannot delete the reserved global symbol $RESTART. If a command procedure has SET RESTART_VALUE commands in it but you want the job to reexecute in its entirety, enter the SET ENTRY/NOCHECKPOINT command to delete the global symbol BATCH$RESTART. If you restart a job that was interrupted, the job starts executing in the section where it was interrupted.