Unreal Engine Issues
Unreal Engine Issues
Crash on packaged dedicated server when a uproperty is marked as both replicated and editor-only
UE - Foundation - Cpp Tools - UnrealHeaderTool - Nov 26, 2024In some situations, it can be useful to have a replicated editor-only C++ property (For example, the user that reported this issue was attempting to replicate settings to the client for game designe ...
Crash in curve editor when fitting vertical after resetting to default
Tools - Nov 11, 2016Crash occurs in the curve editor if the user tries to Fit Vertical after Resetting to Defaults. The crash seems to only occur when a key is deleted, and the user has the last key in the curve selec ...
[CrashReport] UE4Editor-Engine!FMaterialShaderMap::ProcessCompilationResults(TArray<FShaderCommonCompileJob *,TSizedDefaultAllocator<32>
UE - Rendering Architecture - RHI - Feb 21, 2020Generated from CrashReporter ErrorMessage: Assertion failed: Shader [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/Engine/Private/Materials/MaterialShader.cpp] [Line: 1811] Comments: Compile ...
Crash when changing parent of Material Instance with Layered Materials and viewing Layer Parameters
UE - Rendering Architecture - Materials - Aug 1, 2025Reparenting a MaterialInstance that uses Material Layers to another instance with a different layer configuration can cause the editor to crash when opening the Layer Parameters tab. This appears to ...
AIPerception components inherited from a native parent class do not expose the DetectionByAffiliation field on senses for editing in the Blueprint editor's Details view.
UE - Gameplay - Blueprint - Dec 15, 2017The "Detection by Affiliation" field cannot be edited in the Blueprint editor's Details view for an inherited AIPerception component in the "Senses Config" array if the AIPerception component is inh ...
Attempting to Rename Multiple Sockets Crashes the Editor
OLD - Anim - Apr 17, 2019Having multiple sockets selected results in a crash when attempting to change the names of them all at once. The box to change their names appears to be grayed out but you can still click into it. U ...
Crash when Clicking on a Linear Color Default Value in an interface
UE - Gameplay - Blueprint - Jul 19, 2017When selecting a default color for a linear color input for an interface. A crash occurs when trying to bring up the color picker. ...
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 ...
Crash Generating Proxy Meshes after replacing static meshes in the level
UE - World Creation - Worldbuilding Tools - HLOD - Nov 17, 2016Crash occurs when the user attempts to build HLOD after replacing the static meshes in the level with another set of static meshes. Couldn't reproduce this with just any mesh replacing the meshes. ...
Crash when attempting to merge two objects using Simplygon - ProxyMaterialUtilities::CreateProxyMaterialInstance
UE - Gameplay - Aug 4, 2016Engine crashes on completing a simplygon merge of two actors Note If you set On screen size to 50, you can speed up the merge to get to the crash quicker ...