Nikos

You're right, I should have paid more attention when migrating to Delphi 12 🙂

Hi, TLine = class(TObjectList) ... procedure Add(const X: Real); overload; procedure Add(const n: Integer); overload; ... end; In Delphi 12 (Update 1), after the change of TList.Count to NativeInt from Integer, calling the Add procedure like this NewLine.Add(NewLine.Count - 1) calls the Real overloaded procedure in 64bit Delphi, and the Integer one in 32bit Delphi. Am I doing something ambiguous, is it a Delphi compiler inconsistency or a bug? Thanks!