Running a BACKUP or ARCHIVE of a PDSE member that contains more than
15,728,739 records results in a S002-A8 abend.
Backup of large PDSE failed with S002-A8.
as per IBM documentation it can be caused by
o A NOTE macro was issued for a PDSE data member, but the record is
more than 15,728,639 records into the member and
BLOCKTOKENSIZE=LARGE was not specified for the PDSE when it was
opened. NOTE could not return a valid value
Release : 12.5
Component : CA Disk Backup and Restore
To correct this problem please apply the LU00854.