Dear all, the piece of code below works well with Jump until Ver 0.20.6, newer version of JuMP give to to me the error LoadError: KeyError: key (1, 1, 2, 1) not found The BRANCH set is a sparse set indicating the network topology of a power system, while TInBUS is a subset of BUS where generation …

I solved the problem by simply changing the definition of BRANCH from BRANCH = [(Int32(BrancheS[l].line), Int32(BrancheS[l].from), Int32(BrancheS[l].to)) for l=1:length(LINES)] in to BRANCH = [(BrancheS[l].line, BrancheS[l].from, BrancheS[l].to) for l=1:length(LINES)]

Conditional sum in constraint

Specific Domains Optimization (Mathematical)

Fabrizio November 7, 2021, 11:53pm 9

thanks @odow for the explanation, and yes i don’t know if you want to treat as a bug fix, but it may be useful.

Regards,
Fabrizio

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Conditional sum in constraint

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