Hi there,
it was like everytime - i had a problem - i searched the forum - and i found the solution.... (i love MOI and the forum :)

I need the exact circumference of this profile



and i found the UnwrapCurves script - i installed it but only got this bad error...




I was looking into the script but there is no variable "book"...

the only "book" i found is this:



Whats going on ...
Running moi3.1 on el capitan...

Ralf