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

    Specifies the number of temporary work files to be used during
    the sort process.

    Format

      /WORK_FILES=n

    Specifies the number of work files you want. You can specify 0 or
    any value from 1 through 10.

    The default number of work files used during a sort is 2.
    This qualifier is valid when you are fast-loading a file with
    multiple keys or when you specify the /SORT qualifier. For more
    information about sorting, see both the /SORT and the /FAST_LOAD
    qualifiers.