Found the solution. My data file is located in the Preview Content folder in my project. For some reason this is OK when running the app in any simulator, however when running in TestFlight the data file must be in the man app folder. Once I moved it there the problem was solved.
gilgonsalves
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen
User for