I have a deadline this evening...and of course i'm running into issues. I have attached an image of a 3d view of the problem. I have a first floor wall going up to the top plates level, a 1'-2-3/4" gap for my floor system and another wall above it (Aligned perfectly) and have taken the stucco extension minus 1'-2-3/4" and joined both walls. In section the materials mesh and there are no lines separating these walls. But in 3d view and elevations, the line shows up. These walls are perfectly aligned on top of each other. materials are joined. floor system is joined as well. A little guidance would be much appreciated. Let me know if any further clarification is needed.problem.JPG