# Invalid Gurobi license

**URL:** https://discourse.julialang.org/t/invalid-gurobi-license/57324
**Category:** Optimization (Mathematical)
**Created:** [March 16, 2021, 6:36pm UTC](https://discourse.julialang.org/t/invalid-gurobi-license/57324 "2021-03-16T18:36:52Z")
**Posts on this page:** 3
**Page:** 1

<div class="post-metadata">

### Author: ![Yaropro14](https://avatars.discourse-cdn.com/v4/letter/y/97f17d/32.png) [@Yaropro14](https://discourse.julialang.org/u/Yaropro14)
#### Post date: [March 16, 2021, 6:36pm UTC](https://discourse.julialang.org/t/invalid-gurobi-license/57324/1 "2021-03-16T18:36:52Z")

</div>

**After**

ENV[“GRB\_LICENSE\_FILE”] = “/Library/gurobi911”  
ENV[“GUROBI\_HOME”] = “/Library/gurobi911/mac64/”  
import Pkg  
Pkg.rm(“Gurobi”)  
Pkg.add(“Gurobi”)  
Pkg.build(“Gurobi”)  
using Gurobi  
const GUROBI\_ENV = Gurobi.Env()

**Error “Invalid Gurobi license”**

**gurobi.lic file is in gurobi911**

---

<div class="post-metadata">

### Author: ![Henrique\_Becker](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/henrique_becker/32/15443_2.png) [@Henrique\_Becker](https://discourse.julialang.org/u/Henrique_Becker)
#### Post date: [March 16, 2021, 8:16pm UTC](https://discourse.julialang.org/t/invalid-gurobi-license/57324/2 "2021-03-16T20:16:22Z")

</div>

The license is not expired?

---

<div class="post-metadata">

### 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: [March 16, 2021, 8:32pm UTC](https://discourse.julialang.org/t/invalid-gurobi-license/57324/3 "2021-03-16T20:32:13Z")

</div>

What is `Gurobi. _GUROBI_VERSION`?