Unreal Engine Issues
Unreal Engine Issues
Inconsistent texture loading issue within material editor
UE - Rendering Architecture - Materials - Jul 16, 2025A licensee has reached out via EPS about a texture loading issue they are having in-editor. I summarized the most important points below:The issue relates to texture load failure associated with mat ...
Editor crash when attempting to access Window menu bar after compiling plugin through the editor
UE - Foundation - Cpp Tools - Plugin System - Jan 27, 2016The editor will crash if the Window menu button next to Edit is pressed after compiling a toolbar plugin through the editor and attempting to click/use it. ...
Crash While Compiling Blueprint in FBlueprintEditorUtils::RefreshExternalBlueprintDependencyNodes()
UE - Gameplay - Blueprint - Jun 7, 2016Having an actor blueprint (A) that contains an array variable of references to another actor (B) that is connected to a Length node and a Vector array that is connected to a ForEachLoop causes bluep ...
Behavior of configuration file hierarchy is different from document
UE - Foundation - Core - Nov 6, 2015Licensee reported behavior of configuration file hierarchy is different form document here (https://docs.unrealengine.com/latest/INT/Programming/Basics/ConfigurationFiles/index.html) Doc: 1. Engine ...
Actors are not properly restored when undoing a Replace Selected Actors transaction
UE - Gameplay - Components - Jul 22, 2020When undoing a Replace Selected Actors operation, the resulting actor is corrupt and triggers an ensure where the root component is in the process of being destroyed. This is a regression that poppe ...
Crash when attempting to convert a sequencer actor into a BP Class
UE - Anim - Sequencer - Nov 15, 2016Error message: Assertion failed: IsValid() [Link Removed] [Line: 752] Source Context: 738 return *this; 739 } 740 741 /** 742 * Converts a shared ...
Calling a parents function that is used in a child blueprint from a spawn actor from class node that is being called back in the parent will cause an error
UE - Gameplay - Blueprint - May 14, 2015If the user calls a function (We will call it "Parent's Function") from a child blueprint and then turns around and tries to call that implementation of the Parent's Function with in the parent it's ...
Nativized BP Struct dependency can lead to a fatal loader stall
UE - Gameplay - Blueprint Runtime - Mar 7, 2018Report of a chain of dependencies that can lead to a fatal loader stall in a nativized build:Thing -> BPStruct2BPStruct1 -> BPStruct2 The necessary order of operations is:BPStruct1 loadsBPStruct2 l ...
MaterialExpressionLandscapeLayerBlend with material attributes as inputs, the output material attributes have wrong sizes
UE - Rendering Architecture - Materials - Mar 14, 2022From the UDN ticket: When using MaterialExpressionLandscapeLayerBlend with material attributes as inputs, the output material attributes have wrong sizes: ie output Normal attribute cannot be conve ...
Geometry collection - source geometry not updating and reset bug
UE - Simulation - Physics - Aug 17, 2023This issue was reported by a customer trying to modify the static meshes of a GeometryCollection. After removing some meshes from the Geometry Source, he used the Reset button to apply the changes t ...