Hey man, I'm getting that same error to in a league I'm trying to upload into the database. I skipped past the year and tried importing the year after it, and the year after works fine. To be a little obvious, it's gotta have something to do with postseason pitching, but I haven't found out what yet....wait scratch that. During typing I was running a test and the season imported without a hitch!!!!!!!!!!!!! Only bad thing is I had to delete all the postseason stats of the pitchers.

I think the league can do without 1 year of postseason pitching stats since the leagues been around for 12

. But its gotta be something stupid like a pitcher getting shelled without gettting an out, or playing in a game without facing a batter, something. Hope this helps a bit!
Matt