VMS Help LANCP, DEFINE, NODE, Qualifiers, /FILE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /FILE=file-spec
       /NOFILE

    Supplies the file name of a boot file to be used when the
    downline load request does not include a file name (for example,
    with OpenVMS Cluster satellite booting). The file specification
    is limited to 127 characters.

    If no file name is specified, OpenVMS Cluster satellite loads
    default to APB.EXE where the boot type is set to ALPHA and NISCS_
    LOAD.EXE where the boot type is set to VAX.

    If you do not specify the /FILE qualifier, the setting remains
    unchanged. The /NOFILE qualifier clears the field.