VMS Help CONVERT, file, Parameters  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 input-filespec [,...]

    Specifies the file or files to be converted. You may specify
    multiple input files but wildcard characters are not allowed.
    Multiple input files are concatenated to form a single output
    file.

 output-filespec

    Specifies the output file for the converted records. If you omit
    the file type, the Convert utility assigns the output file the
    file type of the first input file. No wildcard characters are
    allowed.