Read Gurobi's .sol file format with JuMP

[Palli]

I would think yes with JuMP, since Gurobi (and CPLEX) are supported with JuMP:

Installation Guide · JuMP

Since those are both proprietary, then what I think you meant is can you use JuMP and only open source software for:

SOL file format: solution files

and I don’t really know. How complex/readable is this format? Is Gurobi’s .sol completely different, or somewhat or fully compatible with IBM’s CPLEX? Some other software might also be able to read it.

JuMP: save SOL file for MILP

Gurobi’s .sol file is not the same as IBM’s: But sure, there are probably solver-specific ways of writing a solution file, but none that are solver-independent. You’re better off writing something like this: import JSON solution = Dict(name(x) => value(x) for x in all_variables(model)) write("solution.json", JSON.json(solution))

EDIT: It seems with free software, there’s something to read SOL (right format?), see:

jump-dev/MathOptInterface.jl/blob/f6f8a09cedb3d8b2e10e18a4ff6e2440ec6954cb/src/FileFormats/NL/sol.jl#L284-L284

Improve error for missing sol file (#184)

I was shocked to see how expensive those solvers are and if you’re long for alternatives for that then I would first find software that can read the files or replace them in any language:

Non-proprietary (Python friendly) alternatives to Cplex and Gurobi