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I would like to understand the meaning of BESTSOLFOUND in the SCIP_EVENTTYPE_BESTSOLFOUND. I have tried to write a callback to execute this event handler that can be found here. By referring to the related document it mentioned that:

a new best primal feasible solution was found

Now what I am willing to know is, what does it mean in the context of SCIP's B&B log file? And How can anyone find out when an event occurs?

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You mean how can you see in the logfile when a new incumbent is found? Whenever there is a new value in the primalbound column.

If you want to know whether your event handler works just print something in the exec callback.

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Dear @Leon, thank you so much. I actually solved my issue based on your valuable comments in my previous question. Since I accepted your answer.

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