LOFT- CURVE DIRECTIONS

Hi all,

So I have a building outline in a curve, and i projected it to a roof surface.

and I've tried to loft the two curves so that I get a volume of a house. Like below

Although the loft script (screen shot above) works for the most of the buildings in the model,

but some buildings still fails (like below) even with the FLIP command with Guiding curve input.

I am attaching part of the model as 3dm file and my working GH file!

Please help!

Thanks,

Jina