[Cbc] Disabling "Reduced Cost Fixing"?

[Dan Fullmer]

I'm trying to display particular variables from the integer solutions found while CBC is running. I've hooked up a CbcEventHandler that pulls in values from bestSolution(). I'm using CbcMain to do the real work on my model. (Like examples/driver4.cpp). I've turned off preprocessing so I'm not looking at the processed model.

However, as my model is being optimized, I will sometimes see:
Cbc0044I Reduced cost fixing - 3125 rows, 14771 columns - restarting search
After which, my callback is never activated, since the event handler isn't registered with the new problem.

Is there an option that I'm missing that can disable this? Or am I going about this the wrong way?

Thanks,
-Daniel Fullmer


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