Blueprint functions with nested structs referencing UDataAssets generate errors if root not passed by value.

UE - Framework - Blueprint - Aug 17, 2022

The source of the error appears to be a stray DefaultValue="None" that's contained within the inner "Test_Nested_TestContainer" split pin (copy/paste the node to notepad to see this). If you refresh ...

Crash when launching a packaged project where a code class gets a reference to a Blueprint widget that contains an instance of a Blueprint struct

UE - Gameplay - Blueprint - Aug 3, 2017

A packaged project will crash on launch if a code class uses ConstructorHelpers::FClassFinder to get a reference to a Blueprint Widget that contains a Blueprint struct variable. Disabling EDL in the ...

Clicking the Yellow Reset to Defaults Button on an exposed Value for struct Arrays always defaults to '0'

UE - Gameplay - Blueprint - Jan 8, 2015

When using the track builder plugin, the default settings for the track width starts at 1. However, when the yellow arrow is clicked to to restore the track back to default it sets it to zero instea ...

Cannot add set/map variables to user defined structs

UE - Gameplay - Blueprint - Jan 11, 2017

For 4.15, we should (ideally) support this, or only provide the array option in sturct (if the other path is too big a change for 4.15 post-branch). ...

User defined struct variables with spaces do not import properly in cooked builds

UE - Gameplay - Blueprint - Aug 11, 2020

DataTables exported to JSON in editor (UDataTable::WriteTableAsJSON, accessible by right clicking a data table and picking export to json) that contain variables with spaces or other outlawed charac ...

User project crashes after changing struct

UE - Gameplay - Blueprint - Aug 10, 2017

EditConditionHides on Member of struct, that is in Array, causes Assertion Failed when clearing Array in Data Table

UE - Editor - Nov 23, 2022

Reproduced 3/3 times. Issue also occurs in //UE5/Release-5.0 - CL 20979098 Binary. Confirmed NOT a Regression. ...

Setting struct variable to CurveTableRowHandle crashes editor

Tools - Sep 9, 2015

Editor immediately crashes if a variable is set to type Curve Table Row Handle within a structure. Frequency: 2/2 Crashreporter: N/A ...

Crash when a StateTree-related Parameter is of a type that includes two nested arrays with the same name (due to FPropertyChangedEvent::ArrayIndicesPerObject using array names to map to their changed indices)

UE - Framework - Dec 19, 2025

This issue was reported in the context of adding and setting parameters on StateTrees, Tasks and related assets, but its root cause lies in the structure FPropertyChangedEvent and can possibly affec ...