Hi!
This library works fine with VFP6 SP5 (just tested). You probably have missed MSVCRT40.DLL in your system. This file is used by convert.fll

>I am trying to use Christof Lange's struct class. I'm getting "Library x:\...\convert.fll is invalid" error from "set library" statement.
>I'm using VFP 6.0 SP6.
>Am I missing any upgrade of convert.fll or something? The one I downloaded is from 15 Oct 1998.