No launchable executable present at path

[XcodeNewb]

Please help.

I have compiled and built many iphone apps using Xcode. I upgraded Xcode last night to the newest version for developers and now I cannot get it to compile my apps.

Once in a while it will build it and run the app in the simulator but if I try to send it to my phone it says "No launchable executable present at path". The app is at the path it is telling me so I don't know why I get the error.

I have deleted the "build" directory and "cleaned all targets" and that may allow it to work in the simulator once or twice before it fails in the simulator also. It never works sending it to the phone.

Any ideas please!?

Thanks

[BlackWolf]

ok, maybe stupid, but perhaps you have set the firmware version in xcode to a different one than the one running on your iphone (probably 3.0?, maybe xcode is set to 2.2.1)