The BooeanUnion command is failing for a simple case because the intersection is not correct. The polysurfaces are both valid and manifold. There is one surface that is coplanar but I was told that the BooleanUnion command should work as long as the shared surface is planar. The file with the geometry is attached. Is there any way to fix this situation?
FAiled Boolean Intersect.3dm (90.2 KB)