Method convertPointToBase is Deprecated

I’m getting this warning under 10.12.5 using an app built with Xojo 2014 R2.1 and MBS Plugins 15.4.
WARNING: Method convertPointToBase: in class NSView is deprecated on 10.7 and later. It should not be used in new applications.

I’m pretty sure I don’t have any declares to this function.
Anyone know what this might be?

I’ve searched the entire 2014r2 code base and there is no text with "convertPointToBase "

I would look at [quote=335026:@Michael Diehr]MBS Plugins 15.4.[/quote]