Couldn't use finite-difference gradient and jacobian approximation

[myozinaung]

I found the options to use finite-difference gradient and jacobian in the following link. https://coin-or.github.io/Ipopt/OPTIONS.html

I try to use those options like this:

options.nlp.jacobian_approximation = 'finite-difference-values'; options.nlp.gradient_approximation = 'finite-difference-values';

or

options.ipopt.jacobian_approximation = 'finite-difference-values'; options.ipopt.gradient_approximation = 'finite-difference-values';

But they don't seem to work.

[ebertolazzi]

probably depend on IPOPT library.