I took my capx apart and the error was gone, But I do not think it was to do with IScroll.
I had 4 sprites, when a line was overlapping each one the frame would go to 1 of that sprite(Green).
When the 4th one was selected then it would go to my level select screen. So as the fourth one was selected I got the error.
No third party plugins were used on this layout.
So I think it might be a C2 error somehow.
Im currently rebuilding the capx from scratch. If i encounter this error again i'll share my capx.