i still need to implement a Minimax-Regret Function into Aimms. The Goal--Function is based on a deviation calculation by using the goal-programming approach. Therefore i added all the necessary constraints and variables. My main model looks like that:
Decision Variable Regret: max(k,sum(j,abs_Regret(j,k))) (k=scenarios and j= potential locations)
myGmp := GMP::Instance::Generate(Minimax_Regret);
But my model still genereates the following error:
GMP::Instance::CreateMasterMIP(): The objective column should be in the coefficient matrix exactly once.
Does someone know how to fix this?
Thank you very much!
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