Problem to install JuMP 0.9 in Julia 1.2.0 : ERROR: failed to clone from “JuMP”,, error: GitError(Code:ERROR, Class:Net, unsupported URL protocol)

General Usage
1

I’m trying to migrate to Julia version >1 but I’m struggling with packages versions. I have installed Julia 1.2.0 in Atom, I have added the pack JuMP but Clp is not working in the latest version of JuMP. So, I have tried to add an old version of JuMP (version 0.19) in order to be able to use Clp solver. But I got the following error:

(v1.2) pkg> add “JuMP”, version = “0.19.0”
  Updating registry at `C:\Users\jra\.julia\registries\General`
  Updating git-repo `https://github.com/JuliaRegistries/General.git`
    Fetching: [=====>                                   ]  10.5 %    Fetching: [=====>                                   ]  11.0 %    Fetching: [=====>                                   ]  11.5 %    Fetching: [=====>                                   ]  12.0 %    Fetching: [======>                                  ]  12.6 %    Fetching: [======>                                  ]  13.1 %    Fetching: [======>                                  ]  13.6 %    Fetching: [======>                                  ]  14.1 %    Fetching: [======>                                  ]  14.7 %    Fetching: [=======>                                 ]  15.2 %    Fetching: [=======>                                 ]  15.7 %    Fetching: [=======>                                 ]  16.2 %    Fetching: [=======>                                 ]  16.8 %    Fetching: [=======>                                 ]  17.3 %    Fetching: [========>                                ]  17.8 %    Fetching: [========>  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   Cloning git-repo `“JuMP”,`
ERROR: failed to clone from “JuMP”,, error: GitError(Code:ERROR,
Class:Net, unsupported URL protocol)

Anyone got the same problem or have an idea about this?
Thanks.

2

Thats not the syntax you use in the Pkg REPL. This is how you do it:

pkg> add JuMP@0.19
3

Thanks! I followed your suggestion and the installation was completed with success

(v1.2) pkg> add JuMP@0.19
 Resolving package versions...
  Updating `C:\Users\jra\.julia\environments\v1.2\Project.toml`
  [4076af6c] + JuMP v0.19.2
  Updating `C:\Users\jra\.julia\environments\v1.2\Manifest.toml`
  [9e28174c] + BinDeps v0.8.10
  [49dc2e85] + Calculus v0.5.0
  [bbf7d656] + CommonSubexpressions v0.2.0
  [163ba53b] + DiffResults v0.0.4
  [b552c78f] + DiffRules v0.0.10
  [f6369f11] + ForwardDiff v0.10.3
  [4076af6c] + JuMP v0.19.2
  [b8f27783] + MathOptInterface v0.8.4
  [77ba4419] + NaNMath v0.3.2
  [276daf66] + SpecialFunctions v0.8.0
  [90137ffa] + StaticArrays v0.11.0

An then Clp pack:

(v1.2) pkg> add Clp
 Resolving package versions...
  Updating `C:\Users\jra\.julia\environments\v1.2\Project.toml`
  [e2554f3b] + Clp v0.6.2
  Updating `C:\Users\jra\.julia\environments\v1.2\Manifest.toml`
  [e2554f3b] + Clp v0.6.2
  [f8899e07] + LinQuadOptInterface v0.6.0
  [fdba3010] + MathProgBase v0.7.7

But when I have tried to create a model, I got the following error:

model = Model(with_optimizer(Clp.Optimizer))
ERROR: error compiling Type: error compiling empty!: could not load library "C:\Users\jra\.julia\packages\Clp\IBQzB\deps\usr\bin\libClp-1.dll"

Stacktrace:
 [1] (::OptimizerFactory)() at C:\Users\jra\.julia\packages\JuMP\iGamg\src\JuMP.jl:99
 [2] #set_optimizer#77(::Bool, ::typeof(set_optimizer), ::Model, ::OptimizerFactory) at C:\Users\jra\.julia\packages\JuMP\iGamg\src\optimizer_interface.jl:38
 [3] #Model#7 at .\none:0 [inlined]
 [4] Model(::OptimizerFactory) at C:\Users\jra\.julia\packages\JuMP\iGamg\src\JuMP.jl:193
 [5] top-level scope at none:0

I’m not sure it is the good syntax but I didn’t find the good way to create a model.
#UPDATE! For this problem I already got the solution: it’s necessary to build Clp before using it:

build Clp