/LIBRARY=filename
       /NOLIBRARY

    Specifies the file name for the device control library. When you
    initialize an output execution queue, you can use the /LIBRARY
    qualifier to specify an alternate device control library. You can
    use only a file name as the parameter of the /LIBRARY qualifier.
    The system always assumes that the file is located in SYS$LIBRARY
    and that the file type is .TLB.