A S0C4-4 would occur only if there were a storage access violation. The
S0C4-11 implies that it is a page translation exception - i.e. that this
4K page has not been allocated within an already allocated segment (else
would have S0C4-10). A S0C1 would have occurred only if the S0C4-11 had
not happened first and executing the instruction x'0000' at <R15> had
then failed. So why was the page not allocated and what executable code
should have been loaded into it - or is its <R15> address corrupted?
(The x'0000' seems to be left-over garbage.) BTW Why load offset x'90'
on R7 as EP?
My ha'pennyworth. CP
Peter Hunkeler wrote:
The storage R7 point to, and the storage at offset x'90' is in SP251 key 8. It
is part of a load module. The fullword at R7+x'90' is the value seen in the
PSW, so both the L as well as the BASSM have been executed. The program fails
when the CP is accessing the instruction at the PSW's NSI. The storage at this
address is a couple of x'00', and the storage is in SP1, key 8.
If anyting was allocated but not accessible, a S0C4-4 would occur, not an
S0C4-11.
--Peter Hunkeler
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Peter Hunkeler
Sent: 22 July, 2016 15:51
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: S0C4-11 abend caused by BASSM to address with all X'00' bytes
I'm confused. Can I not see the obvious?
We've got an S0C4-11 abend in a batch job. The last instructions seem to be
L R15,x'90'(,7)
BASSM R14,R15
R15 has the address that is seen in the PSW in the dump. The storage at this address *is* in the dump, and it contains a couple of X'00'.
How can the storage be in the dump when the abend code suggests it is not even getmained (S0C4-11)? Why is this not an S0C1 (operation exception caused by X'0000' at the PSW NSI address)?
The PSW in enabled, problem state, key 8. The storage pointed to by R15 is in SP 1, key 8.
Any hint what I'm missing?
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