[Ipopt] Infeasible Problem Detected when the problem is actually feasible

Maxime Boulay mboulay at flogen.com
Thu Apr 5 11:27:53 EDT 2018



I am using IpOpt to solve a problem with about 20 variables and 20
constraints. I know the solution to this problem, and I have verified that
my constraints are respected at the solution, there is also no error in the
Derivative Checker. However, IpOpt still ends up giving me the Infeasible
Problem Detected message when I run it. If I keep running it again with the
"warm_start_init_point", it eventually does find the solution. This happens
for many different entry values to this problem. Can anyone help me find a
clue as to why this would happen? 


Thank you.




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