I’m having similar issues. I actually had to convert an old ikonboard to vbulletin. Then vbulletin to bbpress. It’s a massive one too (180k users, 1.8mil posts). I’m doing this all locally with the memory set very high.
All the users managed to get converted but the posts died at 600k. I’m having difficulty continuing the conversion, it won’t start back up. It says it’s working but just sits there.
