As a follow-up to IainNZ’s comments on issue #399, I’ve slightly modified the code to experiment with variable fixings. While I only intend to fix variables of the object r, the fixings are applied to object p as well. I don’t quite understand the functioning of the fixings here. Could someone elaborate on what’s happening behind the scenes?
using JuMP using CPLEX type MyProblem model x y end function createproblem() m = Model(solver=CplexSolver()) @variable(m, 0 <= x <= 2 ) @variable(m, 0 <= y <= 30 ) @objective(m, Max, 5x + 3*y ) @constraint(m, 2x + 5y <= 3.0 ) return MyProblem(m, x, y) end p = createproblem() r = p setlowerbound(r.x, 2) setupperbound(r.x, 2) solve(r.model) solve(p.model)