Joined: 14 Jan 2008 Posts: 2504 Location: Atlanta, Georgia, USA
An EIBRESP of 16 represents an "Invalid Request" (DFHRESP(INVREQ)).
With that, an EIBRESP2 of 28 explanation (from the manual) -
Following a READ UPDATE command without TOKEN, another
READ UPDATE without TOKEN was issued against the same file
without an intervening REWRITE, DELETE without RIDFLD specified,
UNLOCK or SYNCPOINT command. This condition may in some
cases be raised despite the fact that the first READ UPDATE was not
successful, for example because it timed out.
These exceptions can be found in the applicable CICS "Application Programming Reference" manual for your particular version/release.
The 16 and the 28 are warnings to prevent you from deadlocking yourself and raising an AFCI/AFCY abend or even an AKCS abend.