After Effects Render Error: (The name of the output module is already in use. Please Choose another name)

Hi there, I'm currently using after effects CS6 and am trying to save a project but I can't seem to render it because the following error keeps appearing: "The name of the output module is already in use. Please use another name". I know it has nothing to do with the name of the output file as I've tried changing its name but the same error keeps popping up. Does anyone know the solution to this problem or anything that might help? It would be greatly appreciated!!