/OUTPUT=[output-file]

    Specifies that the output file is to contain a bit-to-text
    translations of events.

    By default, output is written to SYS$OUTPUT. If you do not
    specify an output file name, the input file name is used. If
    you do not specify a device and directory, the system defaults to
    your current device and directory. If you do not specify a file
    type, the default file type is .LIS.