Can not launch the app on device

Question

When i try to launch my application from Xcode to the device, i get this error:

error: failed to launch '/Users/Luca/Library/Developer/Xcode/DerivedData/myapp-bmsyknqfiyjuechenbmjnbfmpnsn/Build/Products/Debug-iphoneos/myapp.app/myapp' -- No such file or directory (/Users/Luca/Library/Developer/Xcode/DerivedData/myapp-bmsyknqfiyjuechenbmjnbfmpnsn/Build/Products/Debug-iphoneos/myapp.app/myapp)

I am using Xcode 4.3.2 and iOS 5.1 for my iPhone.

Answer 1

1. Disconnect your device.
2. Delete the app from your device.
3. Quit Xcode completely.
4. Go to ~/Library/Developer/Xcode/DerivedData and look at the folders there ($ ls).
5. Find the one with the app's name in front of it and delete the folder ($ rm -rf ).
6. Reopen Xcode.
7. Connect your device.
8. Build and Run the app (cmd + R).
9. Boom.