Indexing variables by vectors not working in JuMPv1.2.x

Specific Domains Optimization (Mathematical)
3

I have a fix: [Containers] fix DenseAxisArray with Vector key by odow · Pull Request #3064 · jump-dev/JuMP.jl · GitHub

It might take a bit to get a new release, but you can fix your code by adding this function to your script, just after using JuMP. Once we update JuMP, you can remove it.

function Base.getindex(
    x::JuMP.Containers._AxisLookup{Dict{K,Int}},
    key::K,
) where {K<:AbstractVector}
    return x.data[key]
end
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