Originally posted by: r_i_l_e_y

I have an IP model in which the optimal solution is found quickly but cplex then takes a lot of time proving the optimality. I would like to get an exact time of when the optimal (ie last) solution is found by cplex. Can this be done with a callback somehow?
Thanks.

(using python API - not sure if relevant or not).
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Originally posted by: SystemAdmin

Yes. You can use an info callback. For parallel solves, this will possibly be called slightly delayed (but typically not that much). If you want to have the exact time stamp of the solution, you need to use an incumbent callback, but the downside is that using the incumbent callback will disable dynamic search.

Tobias
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