Unreal Engine Issues
Unreal Engine Issues
Unnativized BP function fails to return a valid reference to a component when the calling BP is nativized
UE - Gameplay - Jul 5, 2019The nativized spawner receives an invalid reference from the non nativized actor and fails silently meaning the variable doesn't get set. Additional info: This issue happens when using a pure and n ...
Inconsistencies in SMInstance Proxy Object Creation
UE - Editor - Workflow Systems - May 30, 2023Sometimes when adding instances to Instanced Static Mesh component, you can click on individual instances in the editor and get special detail view - simple transform with the instance index number ...
Split Struct pins cause errors when a project is converted to 4.17
UE - Gameplay - Aug 11, 2017Split Struct pins cause errors when a project is converted to 4.17. You are still unable to split struct pins even if a new variable is created for the struct. Only adding a new variable to the st ...
Internal Compiler Error: Tried to create a property Crash in scope Beta_C, but another object (ObjectProperty /Game/Alpha.Alpha_C:Crash) already exists there.
UE - Gameplay - Blueprint - Oct 31, 2019After fixing the crash from [Link Removed] when compiling the child blueprint that has claimed the component name the parent was previously using without having compiled the parent, an internal comp ...
Mutable constant texture variable with ClipUV mask only works with new experimental dynamic variable is connected as well
UE - Anim - Mutable - Sep 22, 2025We are attempting to use Mutable in 5.6.1 and have encountered an issue which we are not sure how to resolve. The issue occurs when using the ClipWithUVMask node. In short we have a customizable o ...
Editor crashes when importing 4.5.1 project to 4.6
UE - Gameplay - Blueprint - Dec 9, 2014The user converted a copy of their 4.5.1 project to 4.6. Upon opening that project, the editor crashes. Deleting certain widgets allows the user to open the project, but opening any map results in a ...
Bad references for Lighting Scenarios when moving Levels and Map Build Data Registry to different Folder
Tools - Feb 2, 2017When moving Lighting Scenario Levels and their associated Map Build Data Registry to a new folder within the Content Browser, the references within the Levels tab are updated as [MapName_BuiltData]. ...
Key type checking nodes cause the BP to become dirty upon reopening it
UE - Gameplay - Blueprint - Oct 29, 2015All "Key" related BlueprintPure nodes cause the Blueprint to become dirty when the Blueprint is reopened. This includes: Key Get Display Name Key Is Float Axis Key Is Gamepad Key Key Is Keyboard Ke ...
Horde Artifact Browser can produce download URLs greater than 8KB
UE - Foundation - Horde - Storage - Apr 29, 2025Using the Horde Artifact browser browse to a folder with a lot of files in a subfolder (for example temporary artifacts that contains Engine/Binaries/Win64, see attached) and use the "Download" butt ...
Blueprint inheritance can cause dangling references to stale UProperties across compiles
UE - Gameplay - Blueprint Compiler - Jun 6, 2017A number of places in the code rely on raw UProperty pointers to track properties they care about. This can present issues when BPs inherit from other BPs, because the parent's class may be Purged / ...