FI should not report "O804 Method parameter is declared but never used" for method overrides, and for methods implementing interfaces. For example I have many classes which implement IDispatch, I can't change the interface definition and I don't need to use all the parameters of every method.
Do TMS actually look at these forums? No response since 5 Dec 2017?
Sorry, Vincent, it's my fault. I always read forums, getting notifications to email, by often don't have time to respond. I'll try to do better communication at forum.