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 believe that ultimately there are a spectrum of issues at play here. Some may be resolved by clean & rebuild, deleting preferences, etc.

None of these help resolve my issue.

I discovered that I had added some 3rd party code to my app that contained 1.) XIB files for their sample app and 2.) an info.plist file both of which erroneously had been added to my target.

Removing the XIB did not resolve the issue, but removing the info.plist file did.

Check your targets carefully and ensure that the assets that are being built and bundled are in fact needed.