Hi Ed, Thanks for your help. I've changed the build configuration from Debug to Release and the normal Build command works fine. I don't have any compiler macros in the source code. Straker

Thank you for your help. I have updated the Archive settings to Release and am still getting the same error.

Happy to share it with you privately. Thank you.

I am having this same problem. My app builds and runs on a real watch but the hours later it reverts to an old build. I’m running watchOS 11.3, Xcode 16.2. is anyone aware of what’s causing the issue? Thanks.