Unreal Engine Issues
Unreal Engine Issues
SceneCapture2D loses Blendable when Capture Every Frame is turned off even if Scene Capture is updated
UE - Graphics Features - Mar 16, 2016Scene Capture 2D components lose access to the Blendable assigned to them if they are not set to Capture Every Frame at all times. If it gets turned off, the blendable can never be reapplied at run ...
[CrashReport] UE4Editor_Renderer!FMaterialShader::VerifyExpressionAndShaderMaps() [shaderbaseclasses.cpp:148]
UE - Graphics Features - Jun 14, 2017This is a common crash occurring in the 4.16 release. It is spread out across many different CrashGroups with slight variations in Callstack. Additional information is not available at this time. ...
Crash during package save due to the async text mesh build in Text3D
UE - Virtual Production - Sep 22, 2022Saving a package in the editor while there is a queued text mesh build will cause a fatal error because the build will execute during the save, and creating objects while saving is not allowed. This ...
Backwards-compatibility broken for the CDOs of Python-generated Unreal Types because of missing redirectors
UE - Editor - Feb 11, 2025Previously, all Unreal Types generated by python scripts would be created inside package "/Engine/PythonTypes". This was changed by [CL 32478991 in ue5-main branch], which meant to "remove the restr ...
Stalled cook due to PoseSearchDatabase DDC storage/retreival
UE - Anim - Gameplay - Mar 27, 2025reported via UDN: [Link Removed] ...
Crash occurs when duplicating a State Machine in the My Blueprint panel within an Animation blueprint
UE - Anim - Runtime - Anim Blueprints - Aug 17, 2022This is not a regression. Tested in //UE4/Release-4.27 CL18319896 Crash occurs when duplicating a State Machine in the My Blueprint panel within an Animation blueprint. ...
BuildPatchTool doesn't finish if enabled building Http Chunk on Mac
Portal - Jan 25, 2021We may fix this issue by the following codes. FPakPlatformFile::FPakPlatformFile(): LowerLevel(NULL) ,bSigned(false) { // remove //FCoreDelegates::GetRegisterEncryptionKeyMulticas ...
ES2 Fallback Fails on Nougat Devices that do not support Vulkan
UE - Platform - Mobile - Aug 28, 2016Discovered this while doing RC candidate testing for 4.13 Works fine in all other use cases: Nougat devices that support Vulkan Marshmallow devices that support Vulkan Marshmallow devices that don' ...
Assertion failed after closing project on Oculus Mobile - Referencing AudioMixerSourceManager.cpp:300
UE - Audio - Apr 30, 2019This assertion seems to occur when closing the project while a sound is playing on the device. Assertion failed: CommandBuffers[NextIndex].SourceCommandQueue.Num() == 0 [File:D:/P4Workspaces/Switch ...
Indirect lighting samples incorrect if duplicated levels placed in same persistent level
UE - Graphics Features - Aug 29, 2017Indirect lighting samples were not made correctly when building lighting with umap duplicated via the content browser and registering both source and destination as sublevels in one map. ...