Cannot create boundary surface or lofted surface from two closed curves

[Fuergrissa]

The title says it all, one curve is a projected curve, the other is 2D. The closed-loop from the projected curve throws an error if you try to select it for a boundary surface, but is selectable for a loft, however, the loft will not build. I've tried many combinations of guide curves or no guide curves but cannot get something to build. Can someone please try it out and if you get something working tell me how?

[matt]

This may or may not be what you're looking for. I was able to do it, but it wasn't pretty. I did it one pair of edges at a time. And because the spline was only 2 segments instead of 4, like the edge, I had to use the connectors to split it up.

[mattpeneguy]

Probably not correct, but here's an attempt.

[Fuergrissa]

You both generally achieved what I can't but I still cannot figure out how. Did you have any difficulty selecting the projected curve (non-planar, on the Cone shaped Surface). If I try to select if for a Boundary surface it just says "error".

[Lucas]

I did it by doing two 3DSketches Converting Entities from the Edges and the 2D Sketch you left, and positioning the connectors.
I think the way the segments are split is generating bad geometry.

[Lucas]

Also with Loft you could click on Show All Connectors and drag then, if you get lazy to make the Guide Curves. lol
(It would make a self-intersecting surface otherwise)

[mattpeneguy]

You both generally achieved what I can't but I still cannot figure out how. Did you have any difficulty selecting the projected curve (non-planar, on the Cone shaped Surface). If I try to select if for a Boundary surface it just says "error".

I had to play with it a little and I think @Lucas is onto the problem. With Surfaces SW has to make some assumptions if you don't explicitly tell it what to do. SW will outright refuse to do something that will create a self intersecting surface. So, that's likely the problem and why you get the error.

I didn't know about showing all the connectors, that's a handy trick.

[Fuergrissa]

Thank you! I should have tried using "show all connectors", but ultimately I decided it was dumb to try projecting the curve in the first place because like you pointed out, the number of segments was difficult to match. The smarter way to get what I wanted was to leave the boundary surface open on the tank end, but make sure the guide curves went through the tank and then just trim away the extra surfaces after the fact.