Does it need saying that you ought to have your own recovery and take your 
own SVC Dump to meet your own diagnostic needs?

>From what was presented, we know the following:
Page fault occurred (Program check 11, resulting in 0C4-11) at 1ECDE102 
At a time when the difference between register C and the error PSW was 
x'DA'.
On a D7D710001000 instruction. While that is not in the "source", there is 
one in the expansion of AXREXX.
Where the most recent branch before that was at 1ECDE05E 

The error is here
L    R1,=A(@DSECTE-@DSECT)  CALCULATE STORAGE LENGTH 
...
@DSECTE  EQU  * 
* 
        AXREXX  MF=(L,AXREXXL)     

The STORAGE OBTAIN for dynamic storage does not cover the storage needed 
for the AXREXX list form.
@DSECTE's equate needs to be after the AXREXX list form.

Sometimes you're lucky and it doesn't blow up because you might be 
overwriting beyond what you obtained but staying in the same page.
Actually, I consider that unlucky. Sometimes you go beyond the bounds of 
the page into a non-getmained page and it blows up.

Peter Relson
z/OS Core Technology Design


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