Re: A phpBB to bbPress database converter
yoyopop, that happened to me the first few times as well. (I converted a database with about 120,000 posts this morning.) PHP was just running out of allocated memory. I bumped it up to 16 MB, then 64 MB, then 256 MB and finally 1 GB. After I gave it 1 GB the conversion went through.
So check your Apache error_log or your PHP error log to see if it is running out of memory… then give it as much as you can.