After I upgraded to Xcode 6.1, it kept throwing this exception when I tried to build my existing application. I tried to remove \'MyController\' and add back again. But it w
I encountered this problem when I moved my .plist file to a new folder. You have to go into the Targets list (select the top bar on the left vertical menu of Xcode, the one that has the name of your project, and then select Targets on the vertical menu second from the left) and find the Identity section. From there, select the button that lets you specify the new path of the .plist file.
If that doesn't work, then try deleting your project's folder in ~/Library/Developer/Xcode/DerivedData/ and building again.