Unreal Engine Issues
Unreal Engine Issues
Cannot Add Elements to AIPerceptionStimuliSource's Register as Source on an Instance in the Level
UE - AI - Jun 7, 2016When attempting to add an element to the Register as Source for Senses on an instance of a blueprint in the level, the + button has no effect. Clicking the button does not add an element. This work ...
[Input] Switching levels destroys auto-created Input Component which breaks emitUIInteraction
PixelStreaming - Feb 12, 2019We auto-create a PixelStreamingInputComponent which handles the input coming from JavaScript's emitUIInteraction. This works in a UE4 app with a single level, but it seems that if you change levels ...
Blueprint nativization fails using a map type argument as Expose on Spawn
UE - Gameplay - Blueprint - Oct 2, 2020Here's a sample blueprint [Image Removed] The lack of implementation FCustomThunkTemplates::SetMapPropertyByName causes this error.#include "Kismet/BlueprintMapLibrary.h"// The fix needs this head ...
Private functions can be overriden in the "My Blueprint" tab
UE - Gameplay - Blueprint Editor - Apr 29, 2022Discovered during investigation of [Link Removed]. This is happening because we are not filtering out private parent functions in SMyBlueprint::BuildOverridableFunctionsMenu. With any fix that is ...
UMovieSceneTrackInstance::GetWorld() does NOT work properly in Editor
UE - Anim - Sequencer - Mar 28, 2023UMovieSceneTrackInstance::GetWorld() returns nullptr on Editor, so user can't use any function using WorldContext and Subsystem. The following code change may fix this issue UWorld* UMovieSceneTra ...
Invalidation panels can retain stale hittest data when caching is disabled/enabled
UE - Editor - UI Systems - Slate - Aug 20, 2024Changes to the hit test grid of an invalidation panel while caching is disabled won't be respected when caching is reenabled. This can cause interactive widgets such as buttons who were set to colla ...
Dataprep crash
UE - Editor - Content Pipeline - Visual Dataprep - Apr 16, 2025This question was created in reference to: [Link Removed] Last post fixed the import crash, but it seems it added another. If we hit Execute button twice in a row by mistake we get a crash with th ...
When Previewed, Material Nodes are not labeled as such until a new Node is added
UE - Rendering Architecture - Materials - Jan 22, 2016When you preview a node in the material Editor, the node color will correctly switch to the Preview Blue, but will not show the preview tag until another node is added to the Graph. Preview Node:[I ...
Setting Standalone Window Sizes within Editor Preferences not working as Expected
Tools - Feb 24, 2016While testing the 'Shot' command for a user on the AnswerHub, I discovered the reason for the incorrect resolutions of his screenshots, was due to the fact the 'Standalone' window resolution set wit ...
Moving the file location of the Editor Startup map appears to break the reference to the startup map
Tools - Nov 10, 2016Moving the file location of the Editor Startup map appears to break the reference to the startup map. The editor fails to find the map and so does not use it for the start up map. Notes: In the ...