Offset of a curve on surface issue

[etia.1 (etia)]

Hi,
I am straggling to understand why this component give me always an error.
I am trying to offset the contour of my shape inside of the surface.

The surface is an untrimmed one, and the curve is a closed curve.
Any suggestion?
Thank you

offset issue.gh (14.4 KB)

[davidsmavrov]

Here ya go.

offset issue.gh (9.2 KB)

[etia.1 (etia)]

I still get the error message!
“Curve offset failed.”

[davidsmavrov]

Cos I have uploaded the wrong file. Sorry
offset issue.gh (9.2 KB)

[etia.1 (etia)]

Thank you very much!!!