FBSOpenApplicationErrorDomain code =4 error

Question

When I'm trying to run iOS application in Xcode 6 in iPhone 6 simulator, I'm getting error Unable to run app in Simulator.

And error code is:

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

Can any one suggest how to resolve it?

Answer 1

Just closing the iOS Simulator worked for me.

There is not always the need to reset the iOS Simulator. I did not even had to close Xcode.

Answer 2

This problem probably started after we enabled background mode in our app.My solution :

1) Go to simulator
2) Hold cmd + shift
3) Tap 'H' key two times
4) Slide the application off to stop it running in the background.
5) Run again.

(Very tiring to have to repeat the above step each time I build and run)

Answer 3

No need to quit the simulator or reset all content every time .

Just close the app on which you are working if running on background .

it works for me .

Answer 4

Open your app scheme setting and edit it as shown in attached screenshot, Actually you have to disable the "Launch Due to background fetch". Worked for me. Steps, 1. Select your target and select "edit scheme" 2. Select "Options" tab on right side of detail window 3. Uncheck "Launch Due to background fetch" checkbox.

Answer 5

Be careful if you skip installs. I accidentally changed Skip Install on the main target, when i meant to change it on a dependency . When changing it back I had to do a clean.

Answer 6

Disconnect hardware keyboard. In ios simulator main menu Hardware -> Keyboard -> Disconnect Hardware keyboard.