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The error: 

Error spawning child process: Permission denied

pops up in the console about one in every five or ten times that I try to run my project in the Xcode simulator. When this happens the project does not run. Rerunning the project (Cmd-R again) usually works. Can't find any mention of the error on Google, anyone experiencing this?

Edit 2014-07-04, getting this error too.

enter image description here

Running XCode 5.1

Cheers, Paul

paulvs
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  • Anything in the system log (see Console.app)? – trojanfoe Mar 17 '14 at 15:10
  • This is all that I get: `3/17/14 12:16:34.990 PM sim[5185]: Error spawning child process: Permission denied` – paulvs Mar 17 '14 at 15:17
  • That doesn't look like the system log? – trojanfoe Mar 17 '14 at 15:17
  • I'm not very experienced with Macs, but I opened the console app, cleared it and ran the project again and I think that's the only line that corresponds to the error. Any suggestions? – paulvs Mar 17 '14 at 15:20
  • No, I cannot find anything like that on Google or Apple's Developer Forums. Why are you starting the iOS Simulator every time? Surely it should only need starting the first time? – trojanfoe Mar 17 '14 at 15:24
  • Yeah, I couldn't find anything either. And I just use Cmd-R to run the simulator, I don't close it and re-open it. – paulvs Mar 17 '14 at 17:32
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    I had same issue. I changed simulator to iPhone Retina (3.5-inch ) and then back to Simulator back to iPhone Retina (4-inch ). it worked fine. – bademi Mar 22 '14 at 00:35
  • Yeah, I'm gettings it on the 3.5" simulator as well. Also this: [Dead bootstrap subset.] – d2burke Apr 02 '14 at 20:21
  • I am also getting the same error sometime, Can anybody got the solution? – Meenakshi May 08 '14 at 07:27
  • @trojanfoe sys log : `Jul 10 11:42:58 USER Interface Builder Cocoa Touch Tool[54711]: assertion failed: 13C64: libxpc.dylib + 28286 [81ED694C-488A-3466-8AA2-7E0518B10AED]: 0x5 Jul 10 11:42:59 USER ibtoold[54708]: CGSConnectionByID: 0 is not a valid connection ID. Jul 10 11:42:59 USER sim[54717]: Error spawning child process: Permission denied` – GoodSp33d Jul 10 '14 at 06:16

4 Answers4

1

I had the same problem and after some Product -> Clean the message disappeared. So you should try that way!

arniotaki
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I've had to do a clean build of the project and restart both the Xcode 5.1 and the iOS Simulator to solve the problem.

The Dude
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I had the same error. I removed a few lines of commented code, and cleaned the build, before compiling it again. Sounds crazy, but it worked.

Are you having any LLDB errors along with the "Error spawning child process" one?

miragequest
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I'd same issue with xcode5.1.1. Resolved by following steps.

  • Clean build
  • Change simulator selection to iPhone Retina 4 and Run , then back to iPhone 3.5 screen, it works.
Mani
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