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Merge GC clusters crashes game on mobile

When I check Project Settings -> Garbage Collection -> Merge GC Clusters game crashes on Android & iOS without any errors in output logs.

Product Version: UE 4.12
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asked Aug 01 '16 at 02:10 AM in Bug Reports

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gameDNA studio
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In order to better assist you, I'm going to need for you to provide me the logs from your mobile devices.


  • Attach your phone to the computer

  • Go here: C:\NVPACK\android-sdk-windows\tools

  • Open up Monitor.bat

  • Launch the program and save the logs

If you cannot get Monitor.bat to open, please go to: - C:\NVPACK\android-sdk-windows\tools\lib\monitor-x86 - Open up Monitor.exe - Follow the instructions above

iOS Windows:

  • 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

iOS Mac:

  • 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/)

Make sure that you highlight all of the logs, because they do not save unless they're highlighted.

Thank you!

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answered Aug 02 '16 at 09:10 PM

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