/sys$common/syshlp/helplib.hlb SCA, REPORT, Qualifiers, /OUTPUT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /OUTPUT=file-name

    Specifies the output file to use for the report. This value is
    converted to a VAXTPU string and passed as the value for the
    global VAXTPU variable SCA$REPORT_OUTPUT. The default value takes
    the file name from the report-name parameter and the file type
    from the target-file-type parameter. The target-file-type is
    implied by the /TARGET qualifier. For example, if you specify
    DOCUMENT for the /TARGET qualifier, this implies a file type of
    .SDML.