Unreal Engine Issues
Unreal Engine Issues
Asset Registry GetDerivedClassNames does not work properly during editor startup
UE - Foundation - Core - Jun 25, 2020This bug comes from https://udn.unrealengine.com/questions/585499/view.html which describes a problem where a licensee is trying to use the AssetManager to scan a primary asset type that is generate ...
Assertion failed: (Index >= 0) & (Index < ArrayNum) when importing large Alembic file
UE - Editor - Content Pipeline - Datasmith - Importer - May 3, 2022Regression testing done on //UE4/Release-4.27.2 CL-18427296 and this issue did occur. [Link Removed] [Link Removed] Below is snips of customers description and proposed workaround:Importing alembi ...
iOS crash on launch if GoogleVR plugin enabled
UE - Platform - XR - Aug 30, 2016Aug 30 12:56:25 Unreal-Engines-iPhone TestCardboard_0826[472] <Warning>: Failed to load font: file not found at file:///var/containers/Bundle/Application/8224C7F6-6A72-4868-97A9-869A23CD6F2A/TestCardb ...
"FVector contains NaN" on packaged builds for Debug configuration
UE - Graphics Features - Lumen - May 6, 2022Customer Provided Description:This was experienced in UE 5.01 - custom installed engine (No changes to UE code, simply added the Debug build configuration, see the following command): "c:%ue_dire ...
AdditionalPluginDirectories when set are not reflected in generated projects
UE - Core - Cpp Tools - UnrealBuildTool - Jan 3, 2023Bug report viaUDN: We have some plugins that we'd like to share between projects, that we don't want to maintain multiple copies of. The AdditionalPluginsDirectories option for Project's solves tha ...
Out-of-bounds read caused by improper return size from FSocketSteam::RecvFrom in Unreal Engine
UE - Online - Jun 7, 2021Overview: Function at fault: FSocketSteam::RecvFrom (https://github.com/EpicGames/UnrealEngine/blob/c3caf7b6bf12ae4c8e09b606f10a09776b4d1f38/Engine/Plugins/Online/OnlineSubsystemSteam/Source/Private/ ...
Editor crashes due to a material that contains MPCs migrated from another project
UE - Rendering - Architecture - Materials - Apr 29, 2024[2024.04.29-16.49.46:563][970]LogUObjectGlobals: Warning: LoadPackage can't find package /BEURRE_040824_041224/NewMaterialParameterCollection. [2024.04.29-16.49.46:563][970]LogUObjectGlobals: Warning ...
AdditionalPluginDirectories/RemappedPlugins doesn't work for packaged/zenstore build when plugin directory is relative and outside of project directory
UE - Core - Systems - Mar 14, 2024Originated from UDN post:https://udn.unrealengine.com/s/question/0D5QP000007QWuz0AG/additionalplugindirectories-outside-of-project-visual-studio-and-zenstore QUOTE: TLDR: Use of 'escape' paths in U ...
Bloated instruction counts in the material editor causing long compiles
UE - Graphics Features - Apr 17, 2019artists are dealing with greatly increased iteration times due to long shader compiles when working in the material editor. This has regressed over time as we add more features to the point were wor ...
NVIDIA 5080 GPU Crash when launching City Sample with DX12
UE - Graphics Features - Lumen - Apr 16, 2025UPDATE This issue no longer reproduces on driver versions 580.88 and higher. City Sample game crashes immediately upon opening with a NVIDIA 5080 with the latest drivers as well as some previous dr ...