Xcode Fails to Launch iPhone Simulator

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Xcode Fails to Launch iPhone Simulator

I am attempting to launch the iPhone simulator from Xcode, but I keep getting the following error:

Error from Debugger: Failed to launch simulator: Operation failed with underlying error: 4294967253.

I've found a number of posts where Xcode failed to launch the simulator, but none of them match the specific error code I'm receiving.

Whenever I've had issues like this, Force Quitting the simulator from the dock (Alt-Right click), followed by Xcode seemed to do the trick. After doing that I could reload my project and it would run fine.

Failing that, I hear it might help to reboot your mac (though I've never needed to go that far).

davbryn 2010-04-07 13:45:06

Thank you for the response. Unfortunately, it never launches, period, so I can't even force it to quit. I've also rebooted several times, without success. Not knowing Xcode very well, I'm not even sure where else to look.

senfo 2010-04-07 14:00:10

Sorry that didn't help - Could it be a problem with the path to the simulator itself? Has the simulator ever successfully launched? You should be able to launch the simulator via spotlight (cmd-space, type 'spotlight'). If it isn't appearing here it sounds like you've got Xcode installed but not the iPhone SDK (or the simulator bundled with the SDK).

davbryn 2010-04-07 14:40:33

No worries, I appreciate you replying. It did work, at one point. Somebody else borrowed the laptop. When I got it back, it no longer worked.

senfo 2010-04-07 15:20:19

I'm not sure why I didn't try this earlier, but installing the latest version of Xcode fixed the problem.

senfo 2010-04-07 17:30:15

+1 A:

Glad you got things solved senfo. I've found that doing a full rebuild can work as well as checking your system console log for erroneous error message/warnings. Xcode unfortunately seems to be rather poor at conveying errors when deployments fail to the simulator.

Rob Segal 2010-04-08 17:56:32

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Xcode Fails to Launch iPhone Simulator

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