I ran into such problem:
This error appears when to the book a monster was added, I chosen him, examined. I press an output and this error appears. I influenced everything correctly, probably. What is a problem in?
>What's your avatar about? Is it yours? I did not do that drawing. It's a screenshot taken from a comic featuring characters from Touhou such as Tenshi and Iku (the girl in the avatar). It's drawn by someone under the name of Yohane. Link to the comic (SFW, but navigating around Dynasty Reader is NSFW)