Unreal Engine Issues
Unreal Engine Issues
"Failed to find object 'Class None'" in project log after creation
UE - Foundation - Core - Nov 17, 2014Users reported seeing the line "LogUObjectGlobals:Warning: Failed to find object 'Class None.'" in the Output log after creating a project. I was able to confirm in a new blank code project without ...
Steam Sessions fails to create when using the Create Session node
Docs - Nov 30, 2021This is a Regression. 4.26.2 - Binary - no issue creating a session. 4.27.1 - Binary - no issue creating a session if you convert a previously working 4.26.2 project. 4.27.1 - Binary - Fails to c ...
AActor::CheckActorComponents has misleading warning
UE - Gameplay - Components - Apr 24, 2023There's actually two issues going on here: 1. The REINST references are incorrect, and due to [Link Removed]. 2. Blueprint created components will always have different names between the instance ...
Missing Triangles on scaled MetaHuman assets with Nanite enabled
UE - Graphics Features - Nanite - Feb 19, 2025Additional information: only happens when all three conditions are true: the camera is very close to the character, the MH is Nanite, and a scaled mocap animation is appliedmaterial is opaque, shows ...
Exporting Alembic Skeletal mesh from UE4 to FBX causes a crash
Exporting an alembic skeletal mesh that has been imported and then exporting it to FBX using the asset actions options will cause a crash. Tested with: Crash - 4.13.0 Binary CL-3106830 Crash - 4.1 ...
Removing created event from level BP crashes editor if event is tied to object in level
UE - Gameplay - Blueprint - Feb 21, 2015UPDATE: 2/23/2015 Crash is limited to 4.6.1, does not occur in 4.7 Preview 8 or later builds (CL#2448202). ========================================================== Editor crashes if an event is ...
AI MoveTo Blueprint node will zero velocity on Pawn when called, causing a freeze if the Pawn is already moving
UE - AI - Oct 4, 2016AI MoveTo Blueprint node will zero velocity, causing a stop when a new destination is set if the Pawn is currently moving. Regression: Yes Worked: 4.12.5 (CL 3039270) Broken: 4.13.1 (CL 3142249) F ...
Clicking a button in UMG stops all tilt information
UE - Editor - UI Systems - Nov 14, 2014Tilt information is no longer taken after clicking on a button in UMG. The tilt information goes to all zeros. That is until the user clicks else where at which point the device will then start regi ...
D3D HUNG crash - FD3D11DynamicRHI::RHIReadSurfaceFloatData()
UE - Graphics Features - Jan 18, 2017This is one of the widespread D3D Hung crashes that have existed since 4.14. This particular callstack has affected around 300 users. The issue has been successfully reproduced on a home PC. Dxdi ...
Volumetric Lightmaps Persist When Opening Different Level
UE - Graphics Features - Lumen - Feb 24, 2020When moving between levels with built lighting volumetric light maps persists between levels. Workaround: Load the same level twice. Found in 4.24.2 CL#11100242 Reproduced in 4.26 Main CL#11574810 ...