Received following error messages at IPL time.
TSS9079E INVALID DATA
TSS9076I CURRENT OPTION IS <SYSOUT(CLOSE).>
TSS9078I MODIFY OPTION IGNORED
Release : 16.0
The SYSOUT(CLOSE) command is just for JES3 and only works if TSS was started with SUB=MSTR.
Use SUB=MSTR on TSS restarts so that SYSOUT(CLOSE) will work.