I've created a "template" of sorts using Surfaces to terminate my extruded sheet metal features. As you can see in the attached picture, even though it shows the preview just fine, I get an error saying the end face cannot terminate the extruded feature.

You can't really tell in the picture, but the adjacent surface profiles are slightly different - The profile I am attempting to extrude in the picture has a more dramatic taper than the surface highlighted in pink. Note that I was able to get the profile represented in pink to work fine.

Any thoughts or suggestions?