Unreal Engine Issues
Unreal Engine Issues
Crash converting code project 4.7 to 4.8 ; Array index out of Bounds
UE - Gameplay - Blueprint - Jun 18, 2015Some users are experiencing a crash when converting their project from 4.7 to 4.8. From user reports it appears to be affecting those who have added code to their projects and created blueprints bas ...
"Combine Meshes" Breaks Material Slot Assignment
Tools - Jan 18, 2017When importing an FBX with several different meshes and multiple materials with "Combine Meshes" enabled the materials will get assigned to incorrect portions of the mesh. I've included a version o ...
If the DataLayerAsset name or asset path changes, Actors registered to it will ignore the DataLayer's settings
UE - World Creation - Worldbuilding Tools - Feb 5, 2023If you change the DataLayerAsset name or asset path, all Actors registered with that DataLayer will ignore that DataLayer's settings. Specifically, even if you set the DataLayer to the Unloaded stat ...
Bug when trying to Ctrl+Z after Replace Actors
UE - Editor - Workflow Systems - Dec 22, 2023From the UDN case #00649142: My team noticed a bug where sometimes when using "Undo" (Ctrl+Z usually) the BP they are working on disappears in the level. We were able to find a 100% repro case when ...
Divergent group barriers in Lumen
UE - Graphics Features - Lumen - Apr 23, 2025Intel reported GPU crashes on their hardware caused by divergent group barriers in ScreenProbeConvertToIrradianceCS:[numthreads(THREADGROUP_SIZE, THREADGROUP_SIZE, 1)] void ScreenProbeConvertToIrra ...
Editor crashes when setting return value pin to object variable in widget blueprint
UE - Gameplay - Blueprint - Apr 9, 2015Editor crashes when attempting to set an object variable to a return value within widget blueprints. Frequency: 2/2 Crashreporter: [Link Removed] ...
When use Sequence Camera Shake Pattern, Level Sequence occurs error
UE - Anim - Sequencer - Mar 28, 2022When I apply the Sequence Camera Shake Pattern to a Sequencer's camera, I get an error when playing it. ...
Opening a DataTable that is set to a Struct that is using a Key variable will crash the editor
Tools - Nov 3, 2015Opening a DataTable that is set to a Struct that is using a Key variable will crash the editor User Description: I'm getting this crash when using Key variable in DataTable. I was able to repro i ...
Creating an AnimStreamable asset immediately crashes the editor
UE - Anim - Runtime - Feb 6, 2024When creating an anim streamable we immediately fail a check in the compression code in FCompressibleAnimData::FetchData: checkf(AnimSequence, TEXT("Invalid animation sequence while trying to fetc ...
Subobject delimiter replacement in ResolveName can cause previously valid strings to exceed NAME_SIZE
UE - CoreTech - UObject - Nov 8, 2021ResolveName will replace the subobject delimiter (colon) with two periods. This increases the length of the string, and can cause asserts due to the string exceeding NAME_SIZE even when the name was ...