Library /sys$common/syshlp/edfhlp.hlb Operation, Files  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    The Edit/FDL utility produces a new version of the input FDL file
    as its output file unless you explicitly specify a different
    output file using the /OUTPUT=file-spec qualifier with the
    EDIT/FDL command. Unlike the input FDL file, which may or may
    not be found, any Analysis file which is specified (with the
    /ANALYSIS=file-spec qualifier) must be found or the Edit/FDL
    utility terminates.