To invoke AUTOGEN, use the following syntax to enter a command at
    the DCL command prompt:

    $ @SYS$UPDATE:AUTOGEN [start-phase] [end-phase] [execution-mode]

    You are returned to DCL level when the command has finished
    processing unless you specify SHUTDOWN or REBOOT as the end-phase
    parameter.

1  –  Parameters

 start-phase

    Specify the phase where AUTOGEN is to begin executing. The phase
    specified for start-phase must either precede or be identical to
    the phase specified for end-phase. If you do not supply an option
    for the start-phase parameter, enter a null argument (that is, ""
    ). If you do not specify a start phase, GENPARAMS is the default.

 end-phase

    Specify the phase where AUTOGEN is to complete executing. If you
    do not specify an end phase, the end phase has the same value as
    the start phase by default.

 execution-mode

    Specify one of the following execution-mode options to control
    how AUTOGEN uses feedback:

    o  FEEDBACK

    o  NOFEEDBACK

    o  CHECK_FEEDBACK

    o  Blank

    See the separate help topic "Execution_Modes" for a description
    of each option listed here.