Same Problem here - this Converter is not working. Think he searches for the wrong Prefix for vBulletin. But i can not find a vBulletin Prefix anywhere in the Code of the Converter.
@[Unknown] - the Errormessage if it is installed in 2 different Databases is different from this one.

I hope anybody can help. The correct Prefix is vb3_ !
@tumickey - i see you are using SMF now - how did you solve this Problem ?