Unreal Engine Issues
Unreal Engine Issues
HLOD Build crashing when building nanite for mesh with 2 material having the same parameters
UE - World Creation - Worldbuilding Tools - HLOD - Dec 2, 2023From Licensee: Catching the exception with debugger allowed us to find a list of materials on the hlod mesh on which the error occured and we were then able to link it to one of our meshes causing ...
Light Function Materials containing a Texture Sample and Rotator nodes will fail RHI Validation
UE - Rendering - Architecture - RHI - Jan 12, 2026Using a Light Function Material that contains a Texture Sample and Rotator nodes will cause RHI Validation to fail with the following error: LogOutputDevice: Error: Ensure condition failed: Bindings ...
SWorldPartitionEditorGrid2D causing editor to crash
UE - World Creation - Worldbuilding Tools - World Partition - Mar 13, 2023Crash in Material Editor when calling GetScreenSpaceData() from custom node
UE - Rendering - Architecture - Materials - Jan 27, 2023Crash when moving actor on viewport with HierarchicalInstancedStaticMeshComponent.
UE - Gameplay - Components - Aug 28, 2017Create ActorBP has StaticMesh is not assigned to HierarchicalInstancedStaticMeshComponent. Place this actor on the level, and bind the StaticMesh from the Detail tab and add the appropriate Instance ...
A crash can occur when modifying a user-defined struct asset that's indirectly accessed through a variable node.
UE - Gameplay - Blueprint Editor - May 11, 2021If a user-defined struct-type variable is declared in one Blueprint, and that variable is then indirectly accessed in a second Blueprint through a reference to the first Blueprint, modifying the str ...
Crash when importing Alembic data with a large number of vertices if Merge Meshes is enabled.
UE - Editor - Content Pipeline - Datasmith - May 26, 2022Unreal crash on STEP file datasmith import
UE - Editor - Content Pipeline - Datasmith - Importer - May 9, 2018Unreal Crash on .STEP file using the Datasmith importer. Works fine in 4.19.2 ...
Crash when recombining Value Pin after swapping Target Wild Card pin from a Vector2D to a Vector on a Set By-Ref Var node
UE - Gameplay - Blueprint - Jul 18, 2022This is not a regression. Tested in //UE4/Release-4.27 CL18319896 Crash when recombining Value Pin after swapping Target Wild Card pin from a Vector2D to a Vector on a Set By-Ref Var node. ...
User Defined Struct causing crash due to accessing freed memory when using Stompmalloc
UE - Gameplay - Feb 14, 2019A licensee has reported that Custom Structs can cause a crash when using StompMalloc under certain situations. Regression?: No This occurs in 4.20 ...