Unable to run app in Simulator XCode 6.0

Question

After migrating from XCode 5.0 to XCode 6.0 the project fails to run with the following error.

An error was encountered while running (Domain = FBSOpenApplicationErrorDomain,
Code = 4)

Any suggestions?

Screenshot

and you cleaned your project and deleted the file from your simulator before building and running it under Xcode 6, right? — Michael Dautermann, Sep 12 '14 at 23:53
I get such error with xcode 6 sometimes. Everytime fix it by closing simulator and xcode and reopen, and also reset content and settings of the simulator. But in your case I also advice you to clean derivved data of your project in xcode->orgaziner. — Nik Yekimov, Sep 13 '14 at 03:43
@MichaelDautermann had the same problem, none of delete the file, clean the project, or delete the derived folder had any affect - it was only when I did what the selected answer suggested that I was able to run my app. — David H, Sep 29 '14 at 15:14
possible duplicate of [Simulator error FBSSystemServiceDomain code 4](http://stackoverflow.com/questions/24763743/simulator-error-fbssystemservicedomain-code-4) — Jeremy Huddleston Sequoia, Feb 26 '15 at 08:07

Jeff Walters · Accepted Answer · 2014-10-11T01:24:17.800

52

iOS Simulator -> Reset Contents and Settings

Worked for me!

iOS Simulator -> Reset Contents and Settings... -> Reset

enter image description here

referenced from: http://qiita.com/tajihiro/items/f6f50b56162c93d25c90

edited Oct 11 '14 at 01:24

answered Sep 22 '14 at 06:33

Jeff Walters

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Yup - did it for me too. BTW, if you trip on this answer, will you PLEASE upvote the original question - the poor guy has a negative value now, and he even awarded an answer! This Q&A saved me oodles of time!!! – David H Sep 29 '14 at 15:10
Work fine with me! Save much time. – DzungPV Oct 03 '14 at 07:42
Never had to do that before. Must be a bug in the simulator. – JScarry Oct 13 '14 at 20:50
had the same error and this worked for me, thanks :) – sameera207 Dec 11 '14 at 12:24

score 1 · Answer 2 · answered Sep 16 '14 at 14:31

1

I had this error too. My solution was product->clean

answered Sep 16 '14 at 14:31

xiaotest

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Did not do it for me. I also had previously deleted the derived folder. – David H Sep 29 '14 at 15:10
Do "Clean build folder...". Select Product menu while pressing option/alt key. – mraty Jan 02 '15 at 06:53

score 0 · Answer 3 · edited May 23 '17 at 10:34

As described in my answer to the queation that this is a duplicate of, this error is one manifestation of an install/launch race condition bug. The suggestions you find on this forum suggesting that you should "Erase Contents & Settings" or "Clean" from within Xcode are not correct.

You simply have to try again and hope you don't loose the race on the next launch. Alternatively, you can just "finger launch" it from within the booted simulator.

score -2 · Answer 4 · answered Sep 14 '14 at 09:33

-2

I had this error.

I got it while using Xcode 6 on Yosemite.

My solution was to download and install Xcode 6.1 for Yosemite. This solved my issue.

David

answered Sep 14 '14 at 09:33

David Wilson

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As of now, there is no Xcode 6.1 listed under the iOS Developer program. – Alex Zavatone Sep 25 '14 at 15:35

Unable to run app in Simulator XCode 6.0

4 Answers4

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