I am trying to form a solid from surfaces that I created. In order to do so, I wanted to use the Surface Knit feature. However, knitting is not possible due to the rebuild error "The pieces cannot be joined into manifold bodies because more than two sheet bodies cannot be joined together at a single edge junction".

Enclosed you can find the .SLDPRT-file. I know the problem is the surface fill on one side. This somehow overlaps the other surface. However, I can not seem to find any solution to fix this problem and make a solid out of this part.

I would very much appreciate your help and tips.

Thanks a lot in advance.