<div>Dear All</div>
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<div>I implemented my NLP problem in AMPL and used successfully compiled IPOPT as the nonlinear solver to my problem. But when I run the problem it took 225 iterations and said "Restoration Failed", I am pretty sure that my problem is feasible. (Because my problem is acutally a MINLP, and I run it using Bonmin, after 4 attempts of "Restoration Failed", it gave me the optimal solution). Can anyboday let me know what "Restoration Failed" mean exactly? As far as I know, providing different starting point pretty much decides if the Restoration is successful or not.
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<div>Please share with me any comments about that. </div>
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<div>Best</div>
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<div>Roy</div>
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