Can’t join surface and polysurface

When i bake the edge surface and capped loft, I’m able to join the polysurface and surface so the edges are aligned. But it doesn’t work on grasshopper for some reason (21.0 KB)

Looks like It’s because of the surface inbetween the two objects

Maybe cap after the join

Thank you for the reply! joining my loft and edge surface however won’t even work. but if i bake both of them and join in rhino it works and i can cap it off.

here is my file (20.6 KB)

the part that im stuck with is at the very end of the code

Hi, I found the solution! I had to flatten the loft component and EdgeSrf component and it works! I dont know why though…