Xenforo to IP.Board

Hello, i want to make conversion from xenforo to ipboard. I have a place where to make tests, i've installed ipboard 4.4.7. After a few attemps I've finished. I only managed to do the conversionif I took the attachments out to import. The error was: "2V101/A IPS\convert\Library::process:". I only managed to convert if I removed users, attachments, and emoticons.I want to do the full conversion,And if anyone can help me with any information, it would be perfect. Thanks