I have a mixed integer/binary linear programming problem, the free version of excel solver can find a solution that satisfies all the constraints. however, the lp_solve API that I call from C++ could not find a solution. I suspect that excel solver simplifies the problem. So far I locate 2 parameters in excel solver option: mip gap and constraint precision. the former is set to 1%, i set the lp_solve's mip gap to 1%, but I do not know what is the equivalent constraint precision in lp_solve. Anyone can help? Thanks!
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