VMS Help ANALYZE, /RMS_FILE, Qualifiers, /INTERACTIVE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Begins an interactive examination of the file's structure. You
    cannot use wildcards or multiple file specifications. For help
    with the interactive commands, enter the HELP command at the
    ANALYZE> prompt.

    Do not use this qualifier with the /CHECK, /FDL, /STATISTICS,
    /SUMMARY, or /UPDATE_HEADER qualifiers.