Just a thought off the top of my head; I am not familiar with the specific 
issue.

Have you tried to see if SYSSTATE ARCHLVL=3,OSREL=ZOSV2R5 has any effect on the 
issue?

Charles


-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf 
Of Paul Schuster
Sent: Saturday, July 2, 2022 12:33 AM
To: [email protected]
Subject: TIMEUSED macro

There was a discussion from 2020 about 'Strange S0C4 on z15' where the 
instruction

L     15,X'B4C'(0,0)        58F0 0B4C

would cause 0C4 accessing the SVT.

It seems that the TIMEUSED macro, even as of z/os 2.5 level (01* STATUS = 
HBB77C0 ) when coded

TIMEUSED STORADR=STIME  

generates the sequence

TIMEUSED STORADR=STIME         
MACDATE 04/06/2005                                      
LA    1,STIME            AREA FOR RETURN OF TIME VALUE  
L     15,X'B4C'(0,0)     SVT ADDRESS                    
L     15,X'88'(0,15)     ADDRESS OF SERVICE ROUTINE     
BASSM 14,15                                             


which causes 0C4 on the   L     15,X'B4C'(0,0) instruction.

Does the TIMEUSED macro need updating to access the SVT the supported modern 
way?

Thank you.

                                     

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