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From: | Noli Sicad |
Subject: | Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark |
Date: | Mon, 19 Nov 2012 18:30:08 +1100 |
Hi Andrew, > Looks like your instance is maximization while mps always assumes > minimization. You need either to change the objective sign in the > mathprog model or specify --max option for glpsol. I don't understand this statement. Where do you "specify -max option for glpsol"? e.g. glpsol --math TimberHarvestModel_0025p.mod --wfreemps TimberHarvestM_freemps.mps The objective function of the MatProg model is already maximize. e.g. maximize Discounted_Net_Value: sum {s in STAND, p in PERIOD} Stand_Cut_Candidates[s,p] * NPV_Calc[s,p] * FStand[s,p]; Noli
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