ExtendSrf fails again V8

Rhino Rhino for Windows
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1

Hi
I cannot select the edge to extend the surface.
I tried another program and it works very well.
Thanks.
test 01.3dm (154.7 KB)

2

I have auxiliary tools that work well on the same surface.
Excuse ExtendSrf seems to be an outdated algorithm

3

What is this Orang… tool?

4

A Chinese company specializing in shoe tools

5

Thanks, I see this.
RH-79546 ExtendSrf- fails with singularities

-Pascal