# Nonlinear solver other than IPOPT

**URL:** <https://discourse.julialang.org/t/nonlinear-solver-other-than-ipopt/82332>\
**Category:** Optimization (Mathematical)\
**Created:** [June 6, 2022, 6:21pm UTC](https://discourse.julialang.org/t/nonlinear-solver-other-than-ipopt/82332 "2022-06-06T18:21:32Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![odow](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/odow/32/28685_2.png) [@odow](https://discourse.julialang.org/u/odow)\
**Post date:** [June 6, 2022, 9:41pm UTC](https://discourse.julialang.org/t/nonlinear-solver-other-than-ipopt/82332/6 "2022-06-06T21:41:36Z")

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It’s hard to offer advice to generic questions. It’s a lot easier if you can provide a reproducible example. Take a read of: [Please read: make it easier to help you](https://discourse.julialang.org/t/please-read-make-it-easier-to-help-you/14757)

> now the results are inaccurate

How inaccurate?

> Any additional suggestion to try?

Take a look through the Ipopt options:

- [Ipopt: Ipopt Options](https://coin-or.github.io/Ipopt/OPTIONS.html#OPT_fixed_variable_treatment)
- [Ipopt: Ipopt Options](https://coin-or.github.io/Ipopt/OPTIONS.html#OPT_bound_relax_factor)

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