If JuMP solves a MILP using a solver like HiGHS, SCIP, COPT, etc., is it possible to save the solution in a SOL (.sol) file?
There’s no existing code to do this, as far as I’m aware. Of course, it is possible to write your own XML files.
An old post says this can be done for Gurobi by passing a parameter (ResultFile) through JuMP.
.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))