Sorry, just read your post a week late. You should email me or PM me next time. Most likely a divide by zero error, if you modified a player stat to have 0 at bats (i will fix this later), or you somehow corrupted one of your data files. Just go to the download site and download the latest version, as it has the latest player projections and latest software version.
Ran the program in 8 live drafts so far. Happy with all teams...
Author of: http://MLBMockDraftSoftware.blogspot.com/
Author of: http://dodgerSims.blogspot.com/
Author of: http://TheSoberAngels.blogspot.com/
Author of: http://XeiOnSports.blogspot.com/