IRS

  This constant sets the label of the solution where the computation is to be restarted.

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IRS=0 : This setting is typically used in the first run of a new problem. In this case a starting solution must be defined in the user-supplied subroutine STPNT; see also Section 3.3. For representative examples of analytical starting solutions see demos ab and frc. For starting from unlabeled numerical data see the @fc command (Section 3.5) and demos lor and pen.

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IRS>0 : Restart the computation at the previously computed solution with label IRS. This solution is normally expected to be in the current data-file q.xxx; see also the @r and @R commands in Section 3.5. Various AUTO-constants can be modified when restarting.