Using Xcode 4.5.2 and building for iOS4 or newer, I get this message when building for my device (iOS 6.0.1 on 4s). I dismiss the dialog then relaunch the app on my device whic
The answer seems to be "you need to fix your provisioning profile", but can happen for several reasons, as indicated by other answers on here.
In my case, I hadn't added a new device to an existing developer provisioning profile, so I just re-created the profile with the new device, and it worked!