[alysson said:]Dear all,
I am really puzzled with the following:
I have an IP model. ( http://www.icmc.usp.br/~alysson/files/share/sol21.lp ) . If I solve this model (I am using Cplex 11.2, interative optimizer, under Ubuntu ), I obtain an "optimal" integer solution with cost 23 ( http://www.icmc.usp.br/~alysson/files/share/SolutionUsingCplexWithCost23.txt ).
HOWEVER, I know of a solution with cost 21 ( http://www.icmc.usp.br/~alysson/files/share/sol21.mst ). Indeed, if I pass this solution to CPLEX as an mst file, Cplex starts using it as the "Best Integer found" ( http://www.icmc.usp.br/~alysson/files/share/ReadingSolutioWithfCost21.txt ).
Am I missing anything ? Any help is appreciated,