Can't generate font

I am unable to generate a font because of one glyph. The error message says: Something went wrong when Removing Overlap in glyph: Y
There is no overlap, so what is the problem?

I’d have a look at the small segments, probably moving a handle by a unit will suffice. Did you find out if it’s the master drawing or one of the interpolations? (You can press Cmd-Shift-O and see if you can trigger the error message.)

Could you send me the file?

Thanks. It’s sorted now.

It would still be good to hat the file for testing.