I am using CPLEX for solving huge optimization models (more than 100k variables) now I'd like to see if I can find an open source alternative, I solve mixed integer problems (MILP) and CPLEX works great but it is very expensive if we want to scale so I really need to find an alternative or start writing our own ad-hoc optimization librar...
Has anyone used the GLPK for production systems? I have an application currently powered by CPLEX and wish to replace it with a free software alternative. It is used to solve a large MIP (thousands of variables) for a scheduling problem. I would like to know whether GLPK is mature enough to handle this. Thanks ...
I was trying to solve an IMP with CPLEX. It throws an exception "CPLEX Error 1001: Out of memory" when I am building the model. The model contains around 2200000 line. I am getting this error while optimizing after using CPXmipopt. how I can sort it out, note that when I check the memory form task manager, I found some unused memory...
I have a queatoin about IloLPMatrix and addGe. I was trying to follow the example of AdMIPex5.java to generate user defined cutting planes based on the solution to the LP relaxation. The difference is that eh initial MIP model is not read in from a mps file, but set up in the code using methods like addGe, addLe etc. I think this is wh...
Addendum: I realize this post appears to take the form of a rant, but if you could correct any misunderstandings I have, clarify anything, or better yet: help me solve my problem with the iterator issue, I'd be very grateful! I'm currently using cplex 9 (I know it's not the latest, it's out of my hands). Is it just me or could the CPLEX...