Error when testing on iOS simulator: Couldn't register with the bootstrap server

lostInTransit_46297 0
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I was testing my app on the simulator when it crashed on clicking a button of a UIAlertView. I stopped debugging there, made some changes to the code and built the app again. Now when I run the application, I get this error in the console

Couldn't register com.myApp.debug with the bootstrap server. Error: unknown error code. This generally means that another instance of this process was already running or is hung in the debugger.Program received signal: “SIGABRT”.

I tried removing the app from the simulator, doing a clean build but I still get this error when I try to run the app.

What should I do to be able to run the app on my simulator again?

xcode ios-simulator ios
31 Answers

Try quitting and restarting the simulator? If "worse comes to worst" you can always try restarting: in my experience this should fix it.

user_958400

I'm having this problem very often recently. What would prevent this from occurring? Logging out and in fixes the problem but.. it's annoying to do so every so often.

EDIT:

I just found the cause. I had a bug in ApplicationWillTerminate method. So when i click stop button on Xcode window, app couldn't properly terminate and started to hang.

check Activity Monitor to see if your app is on the list. force quit if possible.

user_1526730

If you find your problem is due to zombie processes: 

ps -el | grep 'Z'
(as in the earlier comment https://stackoverflow.com/a/8104400/464289) and just want to fix the problem immediately, you can do so without rebooting or killing anything. Just rename your project target executable:

  1. Click on the project on the left-hand pane
  2. Select Build Settings in the middle pane
  3. Under 'Packaging' change 'Product Name' from $(TARGET_NAME) to $(TARGET_NAME).1

Easy!

user_4642890

I got this error while debugging my app on an iPhone 4. Hard rebooting the iPhone solved my problem. (Powering off the iPhone hung...)

I did not have any zombie process on my mac and rebooting the mac did not solve the problem.

Maybe this bug can manifest itself on both the simulator and actual devices???

user_10699930

I just had this error. I tried restarting the simulator and Xcode but my project would only work again after a clean and build. No idea what caused it.

user_1067030

Oh my - I tried EVERYTHING listed above and in other posts. Re-installed Xcode, rebooted my machine, copied all the missing files into the right folders... Eventually I backed-up my iphone, wiped it and restored it, and it worked!

I think what may have been the cause from reading in and around this was disconnecting my iphone white it was running with performance tools catching leaks. Or some such thing.

Aaaah, big sigh of relief.

user_3342960
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