Yeah, this is a common KMod3 error, I believe.
As far as I know there isn't much you can do about it. IIRC, KMod3 was never really fully released, so what you have is a beta version of it.
I'd recommend that, until there is an improved version of it (...) you should use KMod 2.8. You can download this from our sourceforge account on the main page.
I hope this helps in some way.