The IXCLEAVE macro allows a member of a cross-system coupling facility (XCF) group to change its state from active to not-defined. XCF does not recognize the existence of a member that is in a not-defined state.

Additionally, IXCLEAVE notifies active members in the group that have defined a group user-routine that the target member is now in the not-defined state. XCF delivers outstanding messages sent by the member and discards undelivered messages that were sent to the member.