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

 filespec[,...]

    Specifies the data file to be analyzed. The default file type
    is .DAT. You can use multiple file specifications and wildcard
    characters with the /CHECK qualifier, the /RU_JOURNAL qualifier,
    the /STATISTICS qualifier, and the /SUMMARY qualifier, but not
    with the /FDL qualifier or the /INTERACTIVE qualifier.