I assume that you are using the pre-v2.0.1 platform version here and what have you upgraded to Xcode 5?
I was able to reproduce this error in this configuration. Xcode 5 does not support GDB , which we previously used to communicate with the application running on your device.
If upgrading to use later versions is not an option for you, you can use an older Xcode installation (you may have several versions installed as siblings) and use xcode-select to point us to it, for example:
sudo xcode-select --switch /Applications/Xcode4.6/Xcode.app
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