Two Breps won't join

[ct.rhino (Charlie T)]

Hi, I am trying to troubleshoot why these two Breps won’t join:

The surfaces are separated at the red dashed line.

The upper surface is extruded out of the upper profile so it should definitely be coincident with the edge. Ultimately I need to get these to join so I can cap it.

Internalized script attached. Thanks for any assistance.
unnamed_partial-internalized.gh (16.5 KB)

[dk2079]

i get some revit level picker error on open

but besides that it seems that either you are picking the wrong cherries here, and/or you need the flatten on the brep join because of path mismatch

[ct.rhino (Charlie T)]

path mismatch.