Since I\'ve updated to Xcode 8.1 I can\'t archive and also not run in Release mode (in debug mode its working). The error is that there are several \"duplicate symbols for a
I got this error due to deletion of some files. For me simply cloning my project worked.
Don't double click Project.xcodeproj to start your xcode project. Instead, close your project and open the xcworkspace.
File -> Close Workspace
File -> Open -> Search your project folder for Project.xcworkspace
All my errors are gone.
I had removed files from Compile Sources in Build Phases in Targets. I added main.m
and it worked.