ABEND0AB

ABEND0AB occurs when a VTIOC module issues a VTAM® macroinstruction that fails. Depending on the values of the RPLRTNCD and RPLFDB2 fields, the macro may be retried. If the retry fails, ABEND0AB is issued.

Table 1. ABEND0AB information in a dump of SDWA
Offset	Length (bytes)	Description
X'280'	8	Terminal name
X'289'	1	RPL request type: X'22' = SEND; X'23' = RECEIVE
X'28A'	1	RPLRTNCD
X'28B'	1	RPLFDB2
X'28C'	4	RPLFDBK2 (Sense code)

If this happens during the execution of a SEND or RECEIVE, the session is placed in reconnect status.

The recommended documentation is:

Contents of register 15.
This contains the reason code, which is explained in z/OS Communications Server: IP and SNA Codes.
Message text for message IKT116I.
The software LOGREC entry.
If you have a LOGREC entry, look at an unformatted dump of the SDWA. Table 1 describes the pertinent data you should look for in the dump.
The dump that is created automatically for this abend.
For abends associated with I/O errors, a dump is not generated automatically unless the RCFBDUMP parameter of the TSOKEY00 member of SYS1.PARMLIB is set for it.
For errors that occur during session initialization or termination, run the VTAM internal trace with the options API, PIU, MSG, SSCP, and PSS.
Note: The options API, MSG, PIU, and SSCP are always running internally, but you may want to run the VIT with MODE=EXT to be certain that you get the expected output.