The event exit receives control in SRB mode with an event exit parameter list (IXLYEEPL) that describes the event being reported. Some events reported by the event exit require that you respond to the event, by setting a return code in IXLYEEPL. One return code that you can set specifies that you intend to do additional asynchronous processing and respond to the event at a later time, using the IXLEERSP macro.

Upon return from the event exit, the connected user no longer can access IXLYEEPL. However, IXLYEEPL contains information that will be required by IXLEERSP if that is the method by which you are responding. You must ensure that you copy the relevant IXLYEEPL data into a control block of your own for subsequent use by IXLEERSP.