XES invokes your complete exit to inform you that a previous IXLCACHE, IXLLIST, or IXLLOCK request that you submitted was processed asynchronously and has completed.

For IXLLOCK requests, the complete exit is invoked when you specify MODE=SYNCEXIT. However, if the lock request can be processed synchronously, the MODE keyword is ignored and the request is processed synchronously.

All connected users of a coupling facility structure must provide a complete exit. The COMPLETEXIT keyword of IXLCONN identifies the address of your routine.