# Specifying Gurobi or other linear solvers instead of NUMPS in Ipopt

**URL:** <https://discourse.julialang.org/t/specifying-gurobi-or-other-linear-solvers-instead-of-numps-in-ipopt/35394>\
**Category:** General Usage\
**Created:** [March 2, 2020, 10:18am UTC](https://discourse.julialang.org/t/specifying-gurobi-or-other-linear-solvers-instead-of-numps-in-ipopt/35394 "2020-03-02T10:18:45Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Arega\_Getaneh](https://avatars.discourse-cdn.com/v4/letter/a/7bcc69/32.png) [@Arega\_Getaneh](https://discourse.julialang.org/u/Arega_Getaneh)\
**Post date:** [March 2, 2020, 10:18am UTC](https://discourse.julialang.org/t/specifying-gurobi-or-other-linear-solvers-instead-of-numps-in-ipopt/35394/1 "2020-03-02T10:18:45Z")

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I am using Ipopt on JuMP to solve nonlinear programming. I use Ipopt and it uses `numps` by default. But it recommends me to use other nonlinear

```julia
This is Ipopt version 3.12.10, running with linear solver mumps.
NOTE: Other linear solvers might be more efficient (see Ipopt documentation).

I see the documentation and the options there but doesn't work or I am not sure how to put the option in my model specification `m = Model(Ipopt.Optimizer)
```

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**Author:** ![Arega\_Getaneh](https://avatars.discourse-cdn.com/v4/letter/a/7bcc69/32.png) [@Arega\_Getaneh](https://discourse.julialang.org/u/Arega_Getaneh)\
**Post date:** [March 2, 2020, 10:19am UTC](https://discourse.julialang.org/t/specifying-gurobi-or-other-linear-solvers-instead-of-numps-in-ipopt/35394/2 "2020-03-02T10:19:31Z")

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So appreciate if someone gives me a hint how to do that.