So I go to mesh and go to cleanup and then try again and get the same error. It shows the parts that need to be cleaned up are where the arm and body attached together. They highlighted the vertices and I highlighted the boarder in the picture below.RoadKill;
// Error: Mesh requires cleanup //
Anyone have any idea how to clean this up or fix this? I've been trying for about a half hour now and I can't figure out how to clean this up.

I must also say this edge has been bothering me since I connected it, no way to make it look like a smooth transaction between the arm and the body.
Thanks in advance to any possible help given.