User blog comment:LadyAlys/HabitRPG Unofficial User Data Display/@comment-335543-20150107093759/@comment-24150802-20150113124507

I think I have this fixed now! There is an obscure issue that I haven't seen happen before where completed To-Dos can have no completion date recorded for them. That's not supposed to be possible, so the DDT wasn't checking for it. It is checking now, and I think you should be able to use it without errors. Be sure to tell me if it's still giving you problems! Reload the tool until you see version 3.7c.