Sweep 2 rails

Hi all,
im trying to sweep 2 rails but from some reason i get 2 extrusions
im attaching img and gh+3dm
hope someone could explain me what went wrong

sweep 2.3dm (132.8 KB)
sweep 2.gh (25.5 KB)

Moved to Grasshopper category.

in your file, only one surface is shown, not two extrusions, with one curve going to S is null

you need to flatten the section list

how come not on this end? same file… just curious haha

there is a line on the top

you can make it simple and avoid many components
use list ; serie …etc

sweep.gh (14.7 KB)

Yes, thats very nice and clean
Thanks for a great lesson