[Ipopt] how to select non linear solver

[Wijekoon, Manusha]

Hi

I am trying to tackle a non-linear optimization problem and current solver selected is MUMPS linear solver. I assume this solver cannot solve non-linear problems?
I went through the options available in https://www.coin-or.org/Ipopt/documentation/node40.html but all solvers seems to be linear solvers. But the documentation says it is capable of solving nonlinear problems. How can I select a nonlinear method for my problem?

Thank you
M
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