z/OS MVS Using the Subsystem Interface
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Return Code Information

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

For MVS™ to process broadcast functions properly, you must use the following return code conventions. When a routine returns control to the SSI:
  • Set register 15 to 0.
  • Set the SSOBRETN field in the SSOB control block to one of the following:
    Return Code (Decimal)
    Meaning
    SSWTRTOK (0)
    The function routine recognized the request but did not process it.
    SSWTNDSP (4)
    Do not display message; hardcopy message
    SSWTOKNH (8)
    Display message; do not hardcopy message
    SSWTNDNH (12)
    Do not display message; do not hardcopy message
Note: For a multi-line WTO, the SSOBRETN field is only accepted for the first call to the function routine. The SSOBRETN field is ignored on subsequent calls to present the minor lines.

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