# JuMP v0.19 and CPLEX versions

**URL:** <https://discourse.julialang.org/t/jump-v0-19-and-cplex-versions/25253>\
**Category:** Optimization (Mathematical)\
**Created:** [June 13, 2019, 2:52pm UTC](https://discourse.julialang.org/t/jump-v0-19-and-cplex-versions/25253 "2019-06-13T14:52:22Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![PatrickHealy](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/patrickhealy/32/8887_2.png) [@PatrickHealy](https://discourse.julialang.org/u/PatrickHealy)\
**Post date:** [June 13, 2019, 2:52pm UTC](https://discourse.julialang.org/t/jump-v0-19-and-cplex-versions/25253/1 "2019-06-13T14:52:22Z")

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Greetings.

While upgrading to julia 1.1.1 I thought it would be a good time to upgrade to JuMP 0.19. However, I could not add the CPLEX package (the executable and libraries could not be found) because CPLEX12.6 is not one of the specified versions in CPLEX.jl – this seemed to be an issue for some people previously, too. When I tried to grab teh latest CPLEX executable download from IBM I now find that it is not the “academic” version but, rather, the “free” version with much reduced problem size limits.

Would it be incompatible with the latest JuMP+CPLEX.jl to accept version 12.6 of the executable? The academic license version of 12.9 seems to be unavailable from IBM’s website.

Many thanks,  
P. Healy

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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 13, 2019, 3:55pm UTC](https://discourse.julialang.org/t/jump-v0-19-and-cplex-versions/25253/2 "2019-06-13T15:55:29Z")

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We dropped support for CPLEX \< 12.8 because of a change in the CPLEX API. See [https://github.com/JuliaOpt/CPLEX.jl#help-i-got-loaderror-unable-to-locate-cplex-installation](https://github.com/JuliaOpt/CPLEX.jl#help-i-got-loaderror-unable-to-locate-cplex-installation).

Last time I checked, you could still get an academic instance of CPLEX from IBM. I suggest you follow up with them.

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**Author:** ![PatrickHealy](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/patrickhealy/32/8887_2.png) [@PatrickHealy](https://discourse.julialang.org/u/PatrickHealy)\
**Post date:** [June 14, 2019, 3:53pm UTC](https://discourse.julialang.org/t/jump-v0-19-and-cplex-versions/25253/3 "2019-06-14T15:53:32Z")

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Thanks for the prompt reply. It appears that IBM are reorganizing their academic initiative offerings and this got lost in the shuffle. I have been provided with a workable version of CPLEX 12.9 now.

Thanks again.

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**Author:** ![tkoolen](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/tkoolen/32/1603_2.png) [@tkoolen](https://discourse.julialang.org/u/tkoolen)\
**Post date:** [June 17, 2019, 6:00pm UTC](https://discourse.julialang.org/t/jump-v0-19-and-cplex-versions/25253/4 "2019-06-17T18:00:06Z")

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@PatrickHealy, I’m running into the same issue. Did you just contact them directly?

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**Author:** ![PatrickHealy](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/patrickhealy/32/8887_2.png) [@PatrickHealy](https://discourse.julialang.org/u/PatrickHealy)\
**Post date:** [June 18, 2019, 8:10am UTC](https://discourse.julialang.org/t/jump-v0-19-and-cplex-versions/25253/5 "2019-06-18T08:10:05Z")

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Yes. After contacting the Academic Initiative address I was given a person to write to.

So that he doesn’t get deluged I have written to him asking if it is ok to post his name. If you write to me I will give you his name privately. Apologies for the probably unnecessary furtiveness.

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**Author:** ![tkoolen](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/tkoolen/32/1603_2.png) [@tkoolen](https://discourse.julialang.org/u/tkoolen)\
**Post date:** [June 18, 2019, 2:09pm UTC](https://discourse.julialang.org/t/jump-v0-19-and-cplex-versions/25253/6 "2019-06-18T14:09:06Z")

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Great, thank you!