Unreal Engine Issues
Unreal Engine Issues
Crash when enabling dynamic branch on static switches in Post Process Materials
UE - Rendering - Architecture - Materials - Jun 28, 2023[Link Removed] Some functions to access parameters don't take into account the newly added runtime static switch parameters. It should be straightforward to fix these up: void UMaterialInstance:: ...
Scaled Geometry Collections result in a potential memory leak in Physics/ChaosUpdate
UE - Runtime - Simulation - Mar 30, 2025Scaled Geometry Collections (GC) result in a potential memory leak in Physics. Tracing the memory allocation of a single run of the Editor and multiple Play-In-Editor sessions of a scene that contai ...
[CrashReport] UE4Editor_CoreUObject!HandlePlaceholderScriptRef() [class.cpp:1416]
UE - Gameplay - Blueprint - Nov 10, 2016This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Error message: Access violation - code c0000005 (first/second chance not available) Source C ...
Crash When Changing to Landscape Paint Tool With a Material Function for the World Position Offset of the Landscape Material
UE - Graphics Features - Feb 25, 2019Crash on switching to landscape/paint tab when using a landscape material that has a material function hooked onto the WorldPositionOffset. Working as expected in 4.21 CL# 4753647 Found in 4.22 CL ...
Invalid array length error launching QAGame onto HTML5
UE - Platform - Mobile - Mar 22, 2017Firefox 32-bit Version 52.0.1 This error also occurs in MainRangeError: invalid array length[Learn More] 0943e4e3-83fc-4463-accc-9fd15fd7df6c:157:9 processPackageData blob:http://localhost:53501 ...
In 5.6, bWarningsAsErrors does not work with clang
UE - Core - Cpp Tools - UnrealBuildTool - Sep 20, 2025In 5.6, many warnings and errors specify their command line arguments to the compiler with these new C# attributes: [WarningsClangToolChain(["-Wno-date-time"], ["-Wdate-time", "-Wno-error=date-ti ...
[CrashReport] UE4Editor_MovieSceneTracks!UMovieSceneCameraCutSection::GenerateTemplate() [moviescenecameracutsection.cpp:24]
UE - Anim - Sequencer - Oct 30, 2017This is a somewhat common Sequencer crash that occurs in 4.17 and 4.18. User DescriptionsWas trying to copy and paste a camera movement but something screwed up, I tried to add an already built Cam ...
Instanced Actors: PCG on RuntimeGrid "None" assigns created IAManagers RuntimeGrid "MainGrid", causing cross-grid reference
UE - Graphics Tools - PCG - Graph - May 30, 2026Context PCG can be used to spawn Instanced Actors via the PCG IA Interop plugin, that makes Spawned Instanced Actors available as node. When a PCGActor placed in the level runs a PCG graph that spa ...
Crash saving a destructible mesh after creating it from static mesh
UE - Simulation - Physics - Destruction - Sep 29, 2016Crash occurs when saving a destructible mesh after creating it from a static mesh. ...
Editor cannot handle blueprint structure using an Actor Map variable
UE - Gameplay - Blueprint - Aug 28, 2017If a blueprint structure contains a map variable with Actor Class Reference as the key, populating the map with a custom blueprint (ActorSet) and adding a variable of the structure to any other blue ...