# Gurobi fail to precompile

**URL:** https://discourse.julialang.org/t/gurobi-fail-to-precompile/16993
**Category:** Optimization (Mathematical)
**Created:** [October 31, 2018, 4:46am UTC](https://discourse.julialang.org/t/gurobi-fail-to-precompile/16993 "2018-10-31T04:46:09Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![Ksun46](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/ksun46/32/9437_2.png) [@Ksun46](https://discourse.julialang.org/u/Ksun46)
#### Post date: [October 31, 2018, 4:46am UTC](https://discourse.julialang.org/t/gurobi-fail-to-precompile/16993/1 "2018-10-31T04:46:09Z")

</div>

I didn’t call Gurobi for a long time. It used to work find. But today when I did, I got this

```julia
INFO: Precompiling module Gurobi.
WARNING: Module Compat with uuid 1366427411356359 is missing from the cache.
This may mean module Compat does not support precompilation but is imported by a module that does.
ERROR: LoadError: Declaring __precompile__ (false) is not allowed in files that are being precompiled.
Stacktrace:
 [1] _require(::Symbol) at ./loading.jl:455
 [2] require(::Symbol) at ./loading.jl:405
 [3] include_from_node1(::String) at ./loading.jl:576
 [4] include(::String) at ./sysimg.jl:14
 [5] anonymous at ./<missing>:2
while loading /Applications/JuliaPro-0.6.2.2.app/Contents/Resources/pkgs-0.6.2.2/v0.6/Gurobi/src/Gurobi.jl, in expression starting on line 15
ERROR: Failed to precompile Gurobi to /Applications/JuliaPro-0.6.2.2.app/Contents/Resources/pkgs-0.6.2.2/lib/v0.6/Gurobi.ji.
Stacktrace:
 [1] compilecache(::String) at ./loading.jl:710
 [2] _require(::Symbol) at ./loading.jl:463
 [3] require(::Symbol) at ./loading.jl:405
 [4] eval(::Module, ::Any) at ./boot.jl:235
 [5] eval(::Any) at ./boot.jl:234
 [6] macro expansion at /Applications/JuliaPro-0.6.2.2.app/Contents/Resources/pkgs-0.6.2.2/v0.6/Atom/src/repl.jl:117 [inlined]
 [7] anonymous at ./<missing>:?

```

Anyone knows how to fix this? Thanks!