What is the issue with the following code? I upgraded the packages today and facing the error. It used to work before upgrading. using JuMP, Cbc,Ipopt,Optim m = Model(with_optimizer(Cbc.Optimizer)) @variable(m, 0 <= x <= 2 ) @variable(m, 0 <= y <= 30 ) @objective(m, Max, 5x + 3*y ) @constraint(m…

Please see JuMP v0.19.2 ⇒ v0.18.6 - #3 by odow . This is an unfortunate result of Pkg choosing to downgrade JuMP in order to update GLPK. Run rm GLPK up JuMP@0.19 add GLPK@0.10 It will be fixed by an upcoming release of JuMP.

for easy reference here is the package details. 1.1) pkg> st Status `C:\Users\Himanshi\.julia\environments\v1.1\Project.toml` [c52e3926] Atom v0.9.1 [6e4b80f9] BenchmarkTools v0.4.2 [a076750e] CPLEX v0.5.0 [336ed68f] CSV v0.5.11 [49dc2e85] Calculus v0.5.0 [9961bab8] Cbc v0.6.0 [e2…

[image] Ajaychat3: with_optimizer not defined [image] JuMP - with_optimizer method not working General Usage What is the original link to the example?

Thanks @odow and @jling I removed GLPK but I was not able to upgrade JuMP to v0.19.2 using the ‘up’ command. I try a couple of time to add or upgrade JuMP v0.19, but it was still picking v0.18.6 somehow. So I removed JuMP and then cloned the JuMP package but then GLPK v0.10 was giving a getconstant…

Maybe another solver package (besides GLPK) was forcing the downgrade of JuMP, for similar reasons?

Problem with optimisation code

General Usage

jling August 24, 2019, 3:16pm 3

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Problem with optimisation code

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