The "alignas" keyword cannot be used with a USTRUCT

UE - Foundation - Core - Oct 24, 2018

The 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, 2014

Adding 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 ...

Make Dialogue Context node no longer has the speaker and targets options exposed

UE - Gameplay - Blueprint - Aug 8, 2017

The 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, 2016

The 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, 2024

A 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, 2017

This 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, 2015

There 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, 2020

This 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, 2022

From licensee: The issue here starts in FVoxelizeMeshMerging::ProxyLOD() where the FlattenMaterial created using FMaterialUtilities::CreateFlattenMaterialWithSettings() returns an empty struct. I d ...

Crash opening a structure with a circular reference

UE - Gameplay - Blueprint - Oct 23, 2017

Typically users are unable to select a structs that reference each other but I was able to find a way around this by manipulating the Do Not Save functionality when closing the editor. Not a regres ...