Error on Save about evoluspencil HOT 2 OPEN

Forgot to add, I'm using the standalone version.

Also, I tried (on a copy of the file, which exhibits the same error) to remove 
all
but the first tab, and it saved without error.

Ok, I have isolated the source of the problem: a bitmap image's path has been
changed. It took me a while to notice that an image wasn't displaying, and that 
I
renamed the folder to which that image belongs. The error message was a bit on 
the
cryptic side for me to figure out what exactly was happening.

A friendlier error message might be in order. You can remove this issue, I'll 
just
make a new one.