PokerTracker

I am running Windows 7 and just installed PT 4.01.21 beta to try out

When converting my PT3 database, getting lots of errors of the type:

ERROR: iPoker Big Blind not posted in hand#2790947674 (Line #50126)
and
ERROR: iPoker Invalid pot size/winnings for hand #2860099027 (raked pot: $0.00; total winnings: $0.00) (Line #56236)

Can see some mentions in previous postings about these errors, but nothing stands out as a potential fix ?

Is this a known issue with latest beta ?

I got 174 errors in the end, out of 69'716 total

Could you please export a few of those hands/sessions from PT3 and attach the exported files to a Support Ticket so that we can investigate - that would really help us find out what the problem is.
If you have the original hand history files as well that would be even better, so that we can reproduce the entire issue.
Thanks.