Hi

am trying to loft a series of closed 2d polyline cross sections to create a landscape solid or surface.

It will do 5 but selecting anymore causes it to say the "selected entities are not valid".

this is the link to the autodesk article

but I'm having trouble understanding it. I tried opening all the polylines but that just didn't work.

I've tried revsersing the selection order but no go either.

I will have a go at planesurf but really I was hoping to loft a solid.

Any suggestions?

I'll try and post the file but it's pretty big.