Hi,
I try to loft 2 surfaces (one is from Patch, other is from Curve Network) with grasshopper. This is doesn’t work, and return no error. I think the problem is my upper surface, but I can’t fix it!
Here is the files, if someone can explain me 
Thanks
Loft problem.3dm (3.0 MB)
Loft problem.gh (1.9 KB)
Hello
you must look at your inputs.
For loft curve must be on a list. Here there are on two branches of a tree. Each one has just one curve. So you are asking make a loft with one curve. There must be some warning for that, but it outputs “null” instead !
So flatten inputs and add option of loft
Thanks a lot for theses informations…! It works better
I have to learn more about theses options: Flatten, Graft, Simplify, Reverse, Principal… it’s vague for me.