ITNW

  The maximum number of combined Newton-Chord iterations. When this maximum is reached, the step will be retried with half the stepsize. This is repeated until convergence, or until the minimum stepsize is reached. In the latter case the computation of the branch is discontinued and a message printed in fort.9. The recommended value is ITNW=5, but ITNW=7 may be used for ``difficult'' problems, for example, demos spb, chu, plp, etc.