Unreal Engine Issues
Unreal Engine Issues
Debug information is sometimes missing when compiling with cl-clang
UE - Foundation - Cpp Tools - UnrealBuildTool - Aug 24, 2023Via UDN: As has been discussed previously here and in CL 20055361, debug information is sometimes missing when compiling with Clang. We've pinpointed this to debug information not being emitted fo ...
(BUG) Sequencer Root motion breaks down when using SwapRootWithActor, translation track and transform origin actor
UE - Anim - Anim in Engine - Jul 19, 2024When "Sequencer.ThreadedEvaluation.AllocationThreshold 8" is initiated, characters in a level sequence that have “Swap Root Bone Actor” activated on their animation will begin to slide very fast acr ...
"Visualize Level Instance Editing" defaults to on, during sequencer playback (for sequences withing a level instance)
UE - Anim - Sequencer - Nov 7, 2025Version: Main branch 46320669; 5.7 Preview Epic Launcher pre-built; Issue: Playing a <sequence> that is withing a <level instance> turns back on gray <level instance editing> visualizing shader e ...
PCG crash when using Attribute Remove Duplicates on partitioned data if one of those sets of data is empty
UE - World Creation - Procedural Tools - PCG Graph - Jul 3, 2025Context: In PCG, the Attribute Remove Duplicates node can be used to remove duplicate attributes from an array. Problem: The licensee has observed that using the Attribute Remove Duplicates node ...
Crash When Material is Set to Deferred Decal with Emissive Decal Blend Mode and Forward Shading Enabled
UE - Graphics Features - Jan 25, 2019When Forward Shading is enabled, if you create a material with their properties setup with the following: Material Domain: Deferred Decal - Blend Mode: Translucent - Decal Blend Mode: Emissive T ...
Crash in persona editor when set postprocess animinstance using Linked Layer Anim to skeletal mesh
UE - Anim - Runtime - Anim Blueprints - Aug 29, 2023Crash when set PostProcessAnimBlueprint in persona editor. Related to [Link Removed], [Link Removed]. ...
Physics Asset loses skeletal mesh reference when skeletal mesh is moved to another folder
UE - Gameplay - Apr 10, 2015When moving a skeletal mesh from one folder to another will lose the skeletal mesh reference in the Physics Asset. A warning message will appear. Picture attached. James: Do things like FStringAss ...
Compile error when opening a project on child blueprint calling parent blueprint event
UE - Gameplay - Blueprint - Sep 8, 2015child blueprints calling functions from parent blueprints generate compile errors upon opening project and pressing compile within the child blueprint. Workaround: Open parent blueprint and comp ...
Copying local variables from an event graph to a collapsed graph causes missing local variable warnings upon compil
UE - Gameplay - Blueprint - Aug 25, 2015If a local variable is present within an event graph and then copied in a collapsed node, the copied variables will have a warning: "Unable to find local variable with name 'NewLocalVar_0' for Get ...
Reparenting a blueprint loses information created in the blueprint being reparented
UE - Gameplay - Blueprint - Jun 15, 2015If an actor blueprint is re-parented to another actor blueprint, it will lose information in the blueprint even if nothing has been added to the second blueprint that would change the child blueprin ...