WTO/WTOR Call — SSI Function Code 9

z/OS MVS Using the Subsystem Interface

WTO/WTOR Call — SSI Function Code 9

z/OS MVS Using the Subsystem Interface
SA38-0679-00

All applications running on MVS™, MVS subsystems, and MVS itself, generate messages. Each time a message is generated (with a write-to-operator (WTO) or a write-to-operator-with-reply (WTOR) macro), the WTO/WTOR call (SSI function code 9) is issued.

Note that WTOs and WTORs are issued in one of the following forms:

Single-line message (WTO)
Multi-line message (WTO) — first line of message
Multi-line message (WTO) — subsequent lines of message
Single-line message with reply (WTOR).

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