iOS crash on startup

UE 4.12.3 : With iOS metal crash on startup. 4.11 same project worked.


There’s not nearly enough info there to determine what’s happening other than the fact something is accessing a null pointer.
Post your full startup log so we can at least see where in startup it’s crashing.


Please provide us with your full logs, there is not enough information to go on from here. Exception Type: EXC_CRASH (SIGABRT) implies that you’ve crashed because someone aborted the program.

How to get logs off of an iOS device:


  • Open iPhonePackager (Engine/Binaries/DotNET/IOS)
  • Select a uproject file (Optional)
  • Select the Advance Tools tab
  • Select Other Deployment Tools…
  • Select Backup Documents…
  • Select the IPA for the game you wish to get a log for
  • The documents directory data will then be copied to Engine/Binaries/DotNET/IOS/IOS_Backups or GameDir/IOS_Backups if a uproject was selected
  • The log can then be found at IOS_Backups/Game/Saved/Logs


  • Open Xcode (Install Xcode if you have not already)
  • Open Window|Devices
  • Select the device you want to get the log off of
  • Select the app you want to get the log from
  • Select the gear icon under the app list
  • Select Download Container
  • Select a location for the container file
  • Navigate to the file via Finder
  • Right click and select Show Package Contents
  • Navigate to the location of the log (AppData/Documents/Game/Saved/Logs/)

Hey Jenny,

We have not heard back from you in a few days, so we are marking this post as Resolved for tracking purposes. If you are still experiencing the issue you reported, please respond to this message with additional information and we will offer further assistance.

Thank you!