Unreal Engine Issues
Unreal Engine Issues
Crash Duplicating an empty AtlasRow material node
UE - Rendering Architecture - Materials - Nov 29, 2023This isn't a hard crash, but a "verify(...)" from MaterialExpressions.cpp, line 559. ...
Repackaging the same build produces different order of shader code chunks in IoStore container TOC
UE - Rendering Architecture - Materials - Apr 24, 2024A licensee reported that packaging the build with same content (it is unclear if they were rebuilding the DDC between the runs, but it shouldn't matter) produces a different placement of code chunks ...
Static lighting crash on 5.4 when using landscape with WPO
UE - Graphics Tools - Terrain - Landscape - May 22, 2024When static lighting is built for a landscape with "Use Material Position Offset in Static Lighting" enabled it causes an editor crash. Licensee mentioned it was likely caused by a commit for 5.4, C ...
Skeleton does not match Full Body IK node debug.
UE - Anim - Rigging - Control Rig - May 13, 2025In a simple setup of the Fullbody IK control rig node, when you turn on the debug draw of the ik solve. The lines and the skeleton do not align. ...
Out-of-Bounds Access During Partial Updates of ISMC Per-Instance Custom Data
UE - Graphics Features - Jan 6, 2026When using instance custom data values, removing an instance and changing the number of custom data floats in sequence can cause an array-out-of-bounds crash. The underlying arrays are not resized ...
Crash in blueprints when opening right-click menu
UE - Gameplay - Blueprint - Apr 22, 2015Right clicking inside the event graph of a blueprint that is derived from PhysicsCollisionHandler will crash the editor CrashReporter: [Link Removed] ...
Enums in blueprint macros receive "Direction mismatch" errors upon calling macro in event graph
UE - Gameplay - Blueprint - Nov 6, 2015If a macro that contains an enum and enum output is called within an event graph, the enum will show a direction mismatch error upon placing a copy of the macro into the event graph and recompiling. ...
Compile error when declaring UPROPERTY() TArray with TFixedAllocator
UE - Foundation - Core - Feb 20, 2015Declaring a UPROPERTY() TArray with TFixedAllocator fails to compile. Output log states "Missing '>' in 'tarray'." Removing/commenting out the UPROPERTY() allows the project to compile correctly. ...
Controller Input continues moving viewport camera after disconnecting
Tools - Jul 22, 2015If a controller is plugged in before the editor is opened the viewport camera will start moving forward. If the controller is unplugged the camera will continue the controller input. Additionally, i ...
Deleting static mesh that is used by foliage tool in content browser then selecting foliage window crashes editor
UE - World Creation - Worldbuilding Tools - Foliage - May 11, 2015If a static mesh is being used by the foliage tool and then deleted in the content browser, the foliage tool will retain a copy of the object and crash the editor if the foliage window is selected a ...