028

Explanation
The system could not complete a paging operation
for one of the following reasons: A permanent I/O error occurred during a page-in or swap-in operation.
The data being paged in or swapped in is lost.
A page cannot be accessed on auxiliary storage because of a previous
I/O error.
An indeterminable error occurred during management of central
storage paging.  The system ends processing. Register 15 may contain
a reason code.
The operator canceled a Time Sharing Option Extensions (TSO/E)
user before the TSO/E logon completed.
An address space referred to a pageable link pack area (PLPA)
page that contains noncontiguous code or large constant areas. The
system had already detected this error and issued message IEA928I.
 See message IEA928I.
The system found an unexpected error while processing
an in-real swap request. The error is described by a reason code in
register 6.
The only current copy of a page resides in a defective frame on
expanded storage. An error occurred when the system tried to bring
the page into central storage from the defective expanded frame.
An I/O error occurred when the system wrote the page to auxiliary
storage.
An I/O error occurred when the system attempted to transfer data
from a data-in-virtual object into a mapped window page.
 A reason for the abend code X'028' might be an mmap()
failure. Message BPXM122I might be issued to the hardcopy log.
Abend code EC6 with reason code 0042 might also be issued.

System action
The system abnormally ends the current task or
address space.

Operator response
If the system issued message IEA928I, see
the operator response for that message. Otherwise, notify the system
programmer.

System programmer response
Look for messages indicating a hardware
error. If you find any, contact hardware support. Search problem reporting
data bases for a fix for the problem. If no fix exists, contact the IBM® Support Center. The logrec data
set error record might not contain information regarding this abend.

Source
Auxiliary storage manager (ASM) and real storage manager
(RSM)