SSI Function code 16 and 17 are part of the set of functions that one can use to create a full function "I/O" subsystem; specifically providing the 'open' and 'close' capabilities for said I/O Subsystem (along with several others).
This type of function is usually externalized using the SUBSYS= keyword option on the DD statement in JCL (and associated SVC 99 TU keys). Not sure what you expecting; but these function are NOT 'exit' points in open/close processing nor are they any kind of 'notification' function (like the console command interface SSI #10). Have you checked out: "MVS Using the Subsystem Interface"?? (the z/OS 1.13 level of the manual is: SA22-7642-12) Bill..... IBM z/OS System Software Development and Service ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
