I’m new to grasshopper. This problem might be very simple for someone. I want to create a half sphere like surface based on the curve(polylines) that I created. I tried to use the network surface from grasshopper but it doesn’t work. Thank you for reading this anyway.
If your horizontal curves are closed I highly doubt you’ll be able to do that.
You have a discontinuity:
Network surface_RE.gh (51.1 KB)
After fixing that curve, simple ordering of the curves produces the surface.
OMG, thank you for your reply. How can I miss that connection… But still, it doesn’t work after I joined the one you find and checked other connection is joined.
Sssssssorry, my bad, I used my original grasshopper file to make the surface and it didn’t work. After I replied your commnets, I found the attachment that you provided, so I downloaded it and it works!!! Did you change any setting about the components in grasshopper? The two files look same but mine doesn’t work. Thank you for your helping!!!
All I did was to pick the curves in order.
I guess that’s the part to be the solution. I need to pay more attention to it when I use grasshopper later. Thank you for all your help and explains. 
If you don’t want to worry about selection order or sorting U direction vs V direction try out Pufferfish’s Auto Network Surface component. Here I just jitter the curves to make them out of order.
Thank you for telling the plugin! It works great!
