Very First post in the comments section of the how to convert is by Fore and says Verbatim "This will only work if the converted "Animation mod" is a simple animation replacer. It will not work, if it is an FNIS dependent mod. FNIS dependent mods have a behavior file in the "behaviors" folder. If this file is not converted, ALL (non-creature) characters will show t-pose. What makes it even harder is a quirk of the Bethesda tool. I have made the experience that those FNIS generated behavior files will not always be usable after conversion. I don't know if it is sometimes or always. Since after my first bad encounter I have always re-generated those behaviors with the GenerateFNIS_for_modders tool. Your tool will also not work if you try to convert an animation mod with a fomod setup."
