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Nonlinear Arc Length Control warning

Question asked by Tariq Mehmood on Dec 5, 2014
Latest reply on Dec 18, 2014 by Jared Conway

I have warning notice "negative root in a quadratic equation" while I am solving model under Arc Length Control method. I am still able to get the results without any errors but not quite sure if I can rely on these results because it seems solution time is really short than anticipated. Someone have any idea what's wrong with model?

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