Unreal Engine Issues
Unreal Engine Issues
Copy, Paste and Hover a Material Layer Blend Node causes Crash
Tools - Jun 25, 2015In the Material Editor, if all Live Previews are turned off, copying and pasting a Material Layer Blend Node will crash when the tool tip is being processed. Also Reproduced in Main Promotable-CL-2 ...
Opening a widget blueprint on Linux causes editor to crash
UE - Platform - Linux - Aug 25, 2016The editor crashes when attempting to open a widget blueprint. ...
Crash when launching dx12 for the first time with Rect Lights
UE - Rendering - Architecture - RHI - Mar 20, 2019Users on the forums are hitting a crash on their initial launch of the engine into dx12. There is currently a workaround to load into the project with dx11 first, compile shaders, then youre fine to ...
iOS builds fail on Windows.
UE - Platform - Mobile - May 15, 2026Loading Windows installed iOs mobile provisioning profiles fails at start of iOS build from windows machine. This due to a recent change that attempts to load PKCS12 from mobileprovision files. Thes ...
Crash launching UE4Editor.exe from cmd.exe with -dx12 argument
UE - Graphics Features - Feb 3, 2017My Nvidia driver is our current approved driver: 378.49 ...
GameCenter does not login on Match3 startup on iOS
UE - Platform - Mobile - Aug 23, 2016When launching on or opening a packaged UnrealMatch3 project GameCenter does not login for the paired account. This causes Leaderboards and Achievements to appear blank. Tested on iPhone6s_6240 OS: ...
In Packaged builds, Chaos Cache Manager can't animate Geometry Collections with Nanite Enabled if Cache Mode is set to Static Pose
UE - Simulation - Visual - Feb 27, 2025In Packaged builds, Chaos Cache Manager (CCM) can't animate Geometry Collections (GC) with Nanite Enabled if Cache Mode is set to Static Pose. The licensee tried to animate a CCM using Sequencer onl ...
BP - Exclusive nativization will fail at cook time if a BP class includes a ChildActorComponent with a Data-Only BP set as the ChildActor class.
UE - Gameplay - Blueprint - Apr 20, 2017Note: This does not occur when the nativization mode is set to "Inclusive" in the Project settings. Current workaround: Ensure that the ChildActor class is NOT a data-only Blueprint, by adding scri ...
Niagara and Groom causes exception crash on Launch when using
UE - Simulation - Physics - Mar 2, 2020Trying a Launch after every step shows that the problem occurs as soon as the GroomAssetSystem is added to Niagara. If the GroomAssetSystem is removed, the game launches fine (but the hair doesn't m ...
Linux crash when Exporting content
Tools - Jun 2, 2016When the ExportAll window is opened, changing the file type filter and attempting to edit the chosen file field causes the editor to crash. ...