Thanks, I just found that too.  The bizarre thing is we're allowing that to 
default on both LPARs, which should mean it would fail on the test LPAR as 
well.  We are in the process of changing DIAG00 to force these locations above 
the line on test to see if it will cause the program to fail.

I'll let y'all know what we find out.

This list is GREAT!!!!!

Rex



-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf 
Of Peter Hunkeler
Sent: Wednesday, April 09, 2014 2:17 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: S0C4 abend on old assembler program when upgrading to z/OS 1.13

Just found this in the V1.13 Migration manual:

*Description:* In parmlib member DIAGxx, you can specify the virtual 
location of the LCCA control block (mapped by the IHALCCA macro) or the 
location of the */_PCCA_/* control block (mapped by the IHAPCCA macro) 
to be used when a CPU is brought online. Before z/OS V1R12, if the 
IHALCCA or IHAPCCA structures specified on the CBLOC VIRTUAL24 or 
VIRTUAL31 keyword of DIAGxx did not specify either the 24-bit 
(VIRTUAL24) or 31-bit (VIRTUAL31) location, the default location for the 
LCCA or */_PCCA_/* was in 24-bit virtual storage.

Beginning with z/OS V1R12, the default location for the LCCA and 
*/_PCCA_/* is now in 31-bit virtual storage if you do not specify 
VIRTUAL24 or VIRTUAL31 for the structures IHALCCA and IHAPCCA. If only 
one standard processor is online during the IPL, the LCCA and */_PCCA_/* 
of the IPL CPU will be in 24-bit storage regardless of the 
specification. If there is more than one processor, and DIAGxx permits 
it, you'll have the LCCA and */_PCCA_/* in 31-bit storage.

--
Peter Hunkeler

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