Specify an execution mode when you invoke AUTOGEN to control how
    AUTOGEN uses feedback. The following table lists the execution-
    mode options.

    Option        Description

    FEEDBACK      Specifies that AUTOGEN run in feedback mode, using
                  dynamic feedback collected during the SAVPARAMS
                  phase to make its calculations.
    NOFEEDBACK    Specifies that AUTOGEN not use feedback in the
                  calculations. The feedback from the SAVPARAMS
                  phase is ignored. Use NOFEEDBACK mode for the
                  initial system installation or upgrade. NOFEEDBACK
                  supersedes the execution-mode option INITIAL, which
                  was used in a previous version of the operating
                  system.
    CHECK_        Specifies that AUTOGEN use feedback in its
    FEEDBACK      calculations as long as the feedback is valid. If
                  feedback is suspect, AUTOGEN does not use feedback
                  in the calculations, but continues through the
                  specified end phase.
    Blank         If you do not specify an execution mode, AUTOGEN
                  uses feedback in the calculations by default.
                  However, if AUTOGEN determines that the feedback
                  might be suspect, it performs the calculations,
                  issues the feedback report, and stops before
                  modifying any parameters or system files, even if
                  you specified an end phase of GENFILES, SETPARAMS,
                  SHUTDOWN or REBOOT.