Polysurface edge not continuous

how can I make this closed polysurface edge continuous? I was going to do a sweep1 but that’ll create a gap.

Hi David - if the edges are at least G1, MergeEdge or MergeAllEdges should help, also there is a Chain option in Sweep1. If not, post a file with the object, or send to tech@mcneel.com with a link back here in your comments.