Unreal Engine Issues
Unreal Engine Issues
Player state on clients does not get set properly
UE - Networking - Jul 23, 2015When playing in Standalone with multiple characters there's the the chance that one of the player states does not get set and remains null. This is not a 100% repro case. Multiple tests may be req ...
StableSpringsSystem has lots of warnings
UE - Runtime - Deformable - Apr 6, 2026System successfully compiled with 16 warnings. /Engine/Generated/NiagaraEmitterInstance.ush:2732:250: note: variable 'OutMaterialMultiplier' is declared here void SolveDistanceSpringMaterial_Emitter ...
[CrashReport] Mac/Metal crash - Assertion failed: (PixelShader->Bindings.InOutMask
UE - Graphics Features - Nov 10, 2017This is a low frequency but trending crash coming out of 4.18. User DescriptionsAttempting to open a copied/converted from 4.16.3 project on 4.18 preview 4. Problem arose after preview 3. Was able ...
Null FPhysicsActorHandle dereference in FBodyInstance::InitDynamicProperties_AssumesLocked when CreateShapes_AssumesLocked fails during async body init
UE - Runtime - Simulation - Aug 2, 2026Summary When CreateShapes_AssumesLocked fails during async body creation, the failed FBodyInstance is left in Bodies[] with a released actor handle. InitDynamicProperties_AssumesLocked is then called ...
[CrashReport] UE4Editor-MetalRHI.dylib!FMetalRenderPipelineDesc::CreatePipelineStateForBoundShaderState()
UE - Graphics Features - Jun 29, 2017This is a common crash affecting Mac users in the 4.16 release. Mark.S: "one of the visualisation shaders is setting up bogus render state" Callstack from LogLogActorFactory: Actor Factory create ...
Infinite Script Recursion error crashes editor and produces UnrealScript errors in logs
UE - Gameplay - Blueprint - Aug 14, 2015Macro that causes an infinite script recursion error crashes editor and produces errors in output log referring to UnrealScript. Frequency: 3/3 Crash Reporter; [Link Removed] ...
[CrashReport] Crash on FMaterialEditor::OnCanPromoteToParameter()
UE - Rendering - Architecture - Materials - Jun 22, 2017This is a common crash in the 4.16 release (affecting Windows and Mac). A log file is attached. Users have not provided descriptions so additional information is not currently available. Windows C ...
[CrashReport] Linux crash - FMonitoredProcess::Launch()
UE - Platform - Linux - Sep 14, 2017This is an infrequent Linux crash occurring in 4.17.1. Callstack from Log[2017.09.06-15.26.30:028][666]LogLinux: Error: appError called: Assertion failed: Assertion failed: [File:/home/***/.local/ ...
Build failure packaging for android with GoogleVR plugin enabled
UE - Platform - XR - Oct 12, 2016Android is failing to package when GoogleVR is enabledUATHelper: Packaging (Android (ATC)): UnrealBuildTool: BUILD FAILED UATHelper: Packaging (Android (ATC)): UnrealBuildTool: C:\NVPACK\android-sd ...
Closing the GPU Visualizer window on Linux causes the editor to crash
UE - Platform - Linux - Oct 21, 2015After opening the GPU Visualizer window, pressing the "X" to close the window causes the editor to crash. ...