The TypeDescriptor named '{0}' of the Parameter named '{1}' of the Method named '{2}' of the Entity (External Content Type) ...

The TypeDescriptor named '{0}' of the Parameter named '{1}' of the Method named '{2}' of the Entity (External Content Type) named '{3}' is marked (or has a parent that is marked) for complex formatting. Identifier TypeDescriptors should only be used in complex formatting with caution. It may cause instance methods or Associations executed against instances returned by this TypeDescriptor's Method to fail.