This optional function indicates that the previous directory services management exit routine was replaced by the current routine through a MODIFY EXIT,OPTION=REPL command. For more information about replacing exits, see Replacing VTAM exit routines. For more information about this command, see z/OS Communications Server: SNA Operation.

When an exit is replaced, VTAM® sets the function code to X'09', builds a parameter list, and calls the exit to indicate to the exit that is being driven the first time after being reloaded.