Originally posted by: Lessi

Dear all,

I wrote a MIP model in C++ and let the solver looking for feasible solutions. I plan to write some lines of code to know when the solver finds the best IP solution. Could someone give me hints or examples of how to do it. I read some examples but have not found out what I should do. I guess it should be simple.

Many thanks,

Lessi

Asked and answered here.
 

The solution in the link quoted by Paul has an issue: it uses a control callback which can have negative impact on performance. See the discussion here for alternative solutions.