Extract Solids from Surface issue

Hi,

I have 2 dense TIN surfaces and with C3D’s Extract Solid from Surface function I cannot generate solids between them (perhaps it caused by the high density).

I’ve started to create the solids from Dynamo geometries, but I got stuck at the first step. I wanted to produce a vertical surface out of the extracted boundaries (3D polylines) of the TIN surfaces with Surface.ByLoft node, but nothing happened. The X,Y position of the 2 boundaries are the same.

Do you have any experience in this topic?