Mail Import Freezing Issue

I guess the Mail application on my Macbook updated recently, because when i opened it said it needed to import all of my existing messages to use the new features. The problem is it keeps getting stuck at the same point every time. I've tried it over and over, including restarts, and it always stops at the same point. Here is a screenshot. Please help, I need my mail!

 

Bump?

 

I ended up going into the Apple store and the genius helped me locate the problem folder and delete it