Here is the error message:

Line:    318

Column:    66

Code:    CS1061

Error:    Compiling transformation: CS1061: 'ReturnType' does not contain a definition for 'Name' and no accessible extension method 'Name' accepting a first argument of type 'ReturnType' could be found (are you missing a using directive or an assembly reference?)

Here is my rules content GhostDocRules.txt

Hi Jerry,  

The ReturnType object doesn't contain a Name field. It contains only FullName. In your code, you check Context.CurrentCodeElement.HasReturnType. If it is True, then you should not check for 
!string.IsNullOrEmpty(Context.CurrentCodeElement.ReturnType.FullName).
If you need the ReturnType name, then use ReturnType.FullName.Substring(ReturnType.FullName.LastIndexOf('.') + 1);