Privledge Class D:
Use FREE to release a spool file that was held with the HOLD command.
Either the spooling operator or a user may place a file on hold. The spooling operator is the only one who can
release a file he has held. A double hold occurs when both the spooling operator and user place a hold on a
spool file and both must be released before it can process.
Reference the detailed IBM manaul page here.