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Hello. @Steven P You are/was rigth and my Memory failed, saying that It gave me the same error. It's correct (Estraz_vertici a) And works in the while loop that i made. Also thank you for teaching how to pass a defun result to' another and i ask you how to give more same defun results to another one and different defuns sigle result to another One. Thank you again for tour patience and attention

I see that your code doesn't identify the segment selected on the screen. Therefore, I think you should do that little bit of work first (using vlax-curve functions)

Hi Nikon The side to offset can be defined by the angle between the first and second points of the segment (+1/2π for the left side or -1/2π for the right side). Therefore, you can obtain the offset point by doing the following: (polar p1 (+/- (angle p1 p2)) (/ PI 2.0)) 1)

You mentioned nothing about nested blocks. It worked on your example drawing and mine. I forgot you want 2 tangent lines, I only use a single, maybe I can modify that as an option. I'll look into nested blocks, but I don't think that's going to be easy. Maybe replacing ClipIt with Cookiecutter.

pretty slick! you made a Jig in lisp