Originally posted by: SystemAdmin

[leo said:]

Hi, all

I am using CPLEX 11.1 to solve the MIP by branch and cut algorithm. In my program, three callbacks have been used: incumbent, cut, and branch callbacks.

I let CPLEX start from a feasible integer solution and set status = CPXsetintparam (env, CPX_PARAM_ADVIND, 2);
Now I want to know which callback will be called before solving the root LP when I offer a staring integer solution.

During my implementation, I found that the cut callback is first called. I think that the incumbent callback should be first called.
When I offer a starting feasible integer solution, what will happen in order before CPLEX solves the LP at root node?

Thanks


Leo


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