@Unknown_error
Sorry for the late answer!
Thank you for the feedback. As for the error:
That shouldn't happen! In the worst case, when an item or spell is in an irrecoverably unrecognizable format, my mod should simply skip said item. So clearly I messes up at some point.
Can you do me a favour? Can you upload the file (in its problematic form), so that I can take a look?
A copy of your WeiDU.log file would be welcome, as well!