Hello I have a small problem on Solidworks
Let me explain, when I create a boundary surface from curves, I sometimes want to 'remove' a piece of this surface, but when I remove it using 'restrict surface', the curve created is still and I don't know how to remove it, I don't know if I was clear, so I add a photo
so here is my surface
and when I cut it the bottom curve remains present I don't understand
Thank you all for your help