Failed to launch simulated application: Unknown error

Question

• OS X 10.5.7 (genuine Mac)
• Xcode 3.1.3
• iPhone SDK 3.0

When I try to execute my iPhone application in simulator, I get the dreaded error

Answer 1

I had the same problem. Turned out the Info.plist was "missing" and had to be explicitly declared in the project settings. For some reason using the default name wasn't enough.