UndefVarError: setparams! not defined

Answered

書廷林

April 29, 2022 08:11

My computer is MacBook Pro (13-inch, 2019, Two Thunderbolt 3 ports), MacOS Big Sur

Julia : Version 1.7.2

and the following picture is all the packages I used in Julia

While I using setparams! to set up a Gurobi environment, it occurs some problems in the following picture.

How can I fix this?

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Comments

6 comments

Official comment
Simranjit Kaur

Gurobi Staff

November 16, 2025 23:38
This post is more than three years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum, or try Gurobot, our chatbot interface offering instant, expert-level support.
Simon Bowly

Gurobi Staff

April 29, 2022 09:55 Edited
Hi,

I don't think "setparams!" is part of the JuMP API any more, although I can't figure in which version it was removed. The appropriate functions are "set_optimizer_attribute" (a general JuMP function) or "Gurobi.GRBsetintparam" (part of Gurobi.jl for interacting directly with the solver API).
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書廷林

April 29, 2022 10:44
After change to Gurobi.GRBsetintparam. It occurs another problem in the following picture.

How could I fix this?
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書廷林

April 30, 2022 06:01
Did anyone know where my problem is?

I need this bad
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Simon Bowly

Gurobi Staff

May 01, 2022 05:57
GRBsetintparam is a function, not a macro, so it requires a different syntax. Try the following:
```
Gurobi.GRBsetintparam(env, "OutputFlag", 0)
```
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書廷林

May 02, 2022 05:22
thank you !

It's actually working!!!

thanks a lot
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