The Connect service establishes a record stream by associating
    and connecting a RAB with a FAB. You can invoke the Connect
    service only for files that are already open. The maximum number
    of record streams that can be connected within an image at one
    time is 16383.

                               RAB64 USERS

       RAB64 can replace the RAB or RAB prefix wherever it is used
       with the Connect service on OpenVMS Alpha systems.

    Format

      SYS$CONNECT  rab [,[err] [,suc]]