Thank you Quinn. I am indeed calling Swift from Objective-C as part of a total conversion project. I will look at that post right now. AI in the form of asking google specific questions has given me a lot of things to look at and try. I have tried them all and reported each one in my original post. The annoying thing is that I did this for a previous client a few years ago and was successful. I know this project will be successful too if I can just get it started!!!!! (started finding my Swift class, that is). Next step is to SwiftUIze it, but that of course is another set of problems. Pete

I forgot to mention that I also added TestClass as an @class in the .h file: @class SSPMasterViewController,iMag,TestClass;

I had to nuke DerivedData. I tried both of the before mentioned things so I don't know which one worked.