Unreal Engine Issues
Unreal Engine Issues
Crash when duplicating multiple components at once
UE - Gameplay - Blueprint - Apr 4, 2019When duplicating multiple components at once it appears to crash the editor. Regression: Yes, this appears to be working in the previous version of the engine (4.21.2-4753647) ...
[CrashReport] UE4Editor-UnrealEd!UnFbx::FFbxImporter::BuildStaticMeshFromGeometry
UE - Editor - Content Pipeline - Import and Export - Nov 15, 2019Generated from CrashReporter ...
Attached Project Crashes When Setting RVO Avoidance
UE - Gameplay - Blueprint - May 6, 2016The attached project will crash when attempted to toggle the Use RVO Avoidance option of the Character Movement component. This only occurs after toggling the same option in two other blueprints pri ...
Crash on bake pose when skeleton contains a virtual bone
OLD - Anim - Jan 22, 2018When a skeleton contains a virtual bone, performing Bake Pose can crash the editor. ...
Crash when duplicating an UMG Animation and not renaming the Duplicate
UE - Anim - Sequencer - Dec 19, 2018Crash when duplicating an UMG Animation and not renaming the Duplicate Hitting Enter correctly warns the user you have an existing Animation by that name, and doesn't crash Reproduced in //UE4/Rel ...
Ensure after reparenting Blueprint and moving a property to the new parent
UE - Framework - Blueprint Editor - Jul 20, 2023Moving a property from a recently reparented BP to its new parent will assert in FBlueprintCompileReinstancer::MoveDependentSkelToReinst at ensure(PrevStructSize == NewStructSize) This only see ...
Splitting rotation pins causes values to swap around
UE - Gameplay - Blueprint - May 27, 2016When a rotation pin with set values is split into three float pins, the values set for (X,Y,Z) rearrange themselves in the new float pins as (Y,Z,X). ...
Scaling skeletal mesh components breaks capsule shadows
UE - Graphics Features - May 18, 2016Increasing the scale of a skeletal mesh actor with Capsule Shadows set to true causes the shadow to appear chunky and broken. Regression (No), feature was not present in 4.10.4. ...
Crash in UDataTable::RemoveRow(FName RowName)
UE - Core - Systems - Jun 13, 2025This is a regression, the crash seem to have been introduced by CL 40129784 on ue5-main and persists in latest. Function UDataTable::RemoveRow(FName RowName) uses macro DATATABLE_CHANGE_SCOPE_SINGL ...
Crash when using Export All or Export Selected (UE4Editor-UnrealEd.dll!ULevelExporterFBX::ExportBinary)
Tools - Sep 21, 2017Relates to [Link Removed] [Link Removed] Call stack is similar to the bugs above. Editor will crash when exporting assets from a level that is not dirtied. Another reproduction method is to selec ...