SS$_NORMAL         Normal successful completion. The user output
                       routine has completed the function that the
                       symbiont requested.
    PSM$_FUNNOTSUP     Function not supported. The user output
                       routine does not support or does not recognize
                       the function code supplied by the symbiont.
                       To ensure future compatibility, your output
                       routine should return this status for any
                       unrecognized status codes.
    PSM$_PENDING       Requested function accepted but not completed.
                       Your output routine can return this status
                       only with PSM$K_WRITE and PSM$K_WRITE_NOFORMAT
                       function calls. Further, if your routine
                       returns PSM$_PENDING, your routine must
                       eventually signal completion by way of the
                       PSM$REPORT routine. Refer to the description
                       of the PSM$REPORT routine for more information
                       about asynchronous write operations and the
                       PSM$_PENDING condition value.

    This routine also returns any error condition values that you
    have coded your output routine to return.