Joy and Pain of Xcode - can't find launchable executable

Someone help me out here, I can't run any app I try out before I get this. I've installed all the necessary SDK and supplementary packages, otherwise it wouldn't have let me build my project. I've tried both Cocoa and Carbon so far and neither will work. *Sigh*

Anyone know how I could remedy this to actually start working in xcode?

[EDIT]

PROBLEM SOLVED - Required a reinstall of Xcode Developer Tools.

#466088