Messages issued by the CICS® DB2® attachment facility use the DFHDB prefix which is also used for CICS DBCTL messages. Message numbers are in the range 2000 through 2999 and are reserved for CICS DB2. Thus CICS DB2 attachment messages are of the form DFHDB2xxx.
Where possible, message numbers have been maintained from previous releases of the attachment. For example, message DFHDB2023 documents the same condition as old messages DSN2023 or DSNC023. However, the contents of the message have changed. For example, all messages contain the date, time, and applid.
The destination for transient data messages output by the CICS DB2 attachment facility is controlled using the MSGQUEUE1, MSGQUEUE2 and MSGQUEUE3 parameters of the DB2CONN definition. The same message can be routed to three transient data queues. By default, messages are sent to a single queue called CDB2 which is defined as indirect to queue CSSL.
All messages are documented in the CICS Messages and Codes manual and are available using the CMAC CICS-supplied transaction.