Extend curve

Rhino Rhino for Windows
1

I often use extend curve (2D polylines). I choose boundary and the curve extends to it automatically. But now I get a an extra question: End of extension or enter extension length (number): So it does not extend to the boundary automatically? I get this question with vertical lines, not with horizontal and in 1 specific file, other files no problems? Can’t figure out why? Thanks!

Gerard

2

When you get this, it means that Rhino cannot find an intersection point to extend to. Usually that means that your curves are not in the same plane. Check your stuff in 3D… --Mitch

3

Thanks Mitch!! That is it, It’s non planar, I made a mess creating 2D from 3D.
Gerard