The internal limit in the programming is 32 rounds in an event, which sounded like a very large number in 2005, especially since at the time that program was developed the largest upload file that either WinTD or SwisSys could create was, I believe, 14 rounds.
There has been a report of someone having problems uploading a 22 round event. (Odds are pretty good it is a Blitz event.) I don’t have the files to test with (yet), so I don’t know if this is a problem with the upload routine or something else.
I think Tom Doan has said that recent versions of WinTD have a higher limit now, but I don’t have a copy of WinTD to test with. If someone who has WinTD wants to try to generate an event with more than 20 rounds (up to 32) and send me the 3 DBF files (ZIP them to avoid corruption in email), I would appreciate it.