Unreal Engine Issues
Unreal Engine Issues
The "alignas" keyword cannot be used with a USTRUCT
UE - Foundation - Core - Oct 24, 2018The alignas keyword is not usable with a USTRUCT. It can be used with a normal struct. ...
Adding a code class derived from SceneCaptureComponent2D to a project will prevent that project from building successfully in Visual Studio.
UE - Graphics Features - Dec 9, 2014Adding a code class that derives from SceneCaptureComponent2D will cause the build to fail in Visual Studio. Build Errors: 1>MySceneCaptureComponent2D.cpp.obj : error LNK2001: unresolved external ...
FInstancedStruct member uproperties are not cached when "Generate Optimized Blueprint Component Data" is enabled
UE - Framework - Blueprint - Nov 18, 2025A licensee has encountered an issue where their FInstancedStruct isn't being gathered into CachedPropertyData when "Generate Optimized Blueprint Component Data" is enabled. The changes in [Link Remo ...
Make Dialogue Context node no longer has the speaker and targets options exposed
UE - Gameplay - Blueprint - Aug 8, 2017The Make struct node for Make Dialogue Context no longer has the "Speaker" and "Targets" pin exposed. ...
Crash when opening a data table that references itself in a data table row handle
UE - Editor - UI Systems - Localization - Jun 30, 2016The Editor crashes when a data table references itself by using the data table row handle setting in a struct ...
[AI] FInstancedStruct is not dupilicated properly if values are different from an Actor's defaults
UE - AI - Jan 24, 2024A licensee reports that the values of an FInstancedStruct do not get properly duplicated if they differ from the default values of the Actor or TArray to which they belong. Possible short-term wo ...
[CrashReport] UE4Editor_CoreUObject!UPackage::Save() [savepackage.cpp:4597]
UE - Gameplay - Blueprint Compiler - Jul 14, 2017This is a common crash affecting users in 4.16. Users have not provided additional information. Source Context// Set the parent index, ifthis export represents a UStruct-derived object 4589 ...
There is no way to add a value to an Actor variable in a Data Table
UE - Gameplay - Blueprint - Jan 21, 2015There is no way to add a value to an Actor variable in a Data Table. Currently, Structs accept Actor as a variable type, though no default value can be set. If a Data Table is made from a Struct wit ...
Crash on hot reload for DynamicDelegate
UE - Foundation - Core - Mar 23, 2020This issue may be badly implemented, but the reference to the VTable may be incorrect during a hot reload. Crash always in sample project. Summary:Call ForeachRow function in Custom Struct constr ...
Crash in FMaterialUtilities::CreateFlattenMaterialInstance when building Simplified HLOD layer
UE - World Creation - Worldbuilding Tools - HLOD - Aug 17, 2022From licensee: The issue here starts in FVoxelizeMeshMerging::ProxyLOD() where the FlattenMaterial created using FMaterialUtilities::CreateFlattenMaterialWithSettings() returns an empty struct. I d ...