Xcode: failed to get the task for process

Question

I\'ve run in release mode my app on a iPhone with Xcode 4.

Everything worked great until when I switch to the simulator and I switched back to the iPhone. After swit

Answer 1

Just had the same problem - app was being installed OK, but won't run from Xcode with the "process launch failed: failed to get the task for process".

Turns out my development certificate expired during the night. Regenerating the certificate and the provisioning profiles solved the problem.