Cannot trim or project onto a surface

I created a boat hull surface using edge curves, surface is what I want but I cannot trim the surface to put in topside windows or even project a curve onto the surface. I have never had this happen before. Any ideas?

Welcome @wgmuir
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moved to Rhino for Windows

Hello - please post the surface, the input curves and the cutting objects in a Rhino file. My guess is there are stacked control points in the surface but that is a wild guess, please post the geometry if possible.

-Pascal

Hi, If the surface is small there is a chance it does not trim.
Try to scale up the surface to trim and the cutting curve.

For making this process faster, I use in a button in my custom tool bar:

Scale Up

! _Scale
0
10
enter
'_Zoom _Selected

Scale Down

! _Scale
0
0.1
enter
'_Zoom _Selected

1 Like

Got it, Thank you all.