This is to help with mesh errors
import .x into mender let it run through its animation them click menu save as compressed format txt
when out put simply change text file .txt tp .x format
I sure thats right long time since i used it.
see my video tut on Animer here
https://www.youtube.com/watch?v=y5DwNE6QYhI&spfreload=10
hope this helps
They are free software so I break no copyright