PokerTracker

First, when I converted my PT3 Db into PT4 I lost 2k hands. But there were no errors..... ? How can this be?

There is a huge difference between the PT3 and PT4 EV-Graph. How can this be? Which one is wrong? (I think, but don't hope PT4)

Okay, sry.

In the old I had an alias with 2k hands. This alias is not known in the new PT4 database. So all hands were converted.

But the ev picture/problem is the "same".

Without seeing the hand histories it's hard to be sure, but it's likely that difference is just a few bigger hands. Please compress the HH files and attach them to a ticket. Post the ticket number here so that we can check them out.
Thanks.