Unreal Engine Issues
Unreal Engine Issues
TAttributeContainer::CopyFrom crashes when container contains invalid bone indices for active mesh
UE - Anim - Runtime - Jun 16, 2024Currently there's no validation within the animation attribute container that bone ids are valid. This means that client/game code can add attributes with invalid bone ids into the container and th ...
Editor crashed when opening TM-MeshPaint in QAGame
UE - Graphics Features - Jan 20, 2017While reviewing [Link Removed] test case, I hit the following crash opening the TM-MeshPaint level. On first attempt shaders were compiling, on attemps after, editor crashes much faster. ...
Adding an LOD while in PIE or Simulate Cauases the Editor to Crash
UE - Niagara - Apr 29, 2019If you add an LOD while the editor is simulating or playing, the Editor Crashes. Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 5660361, 4.23 CL# 6063286 ...
Crash on clicking Column Header in visRT window
Tools - Apr 22, 2015The Engine will crash when you run the visRT command in Editor and click on an item in the visRT window and the click on a column header. also Reproduced in Main Promotable-CL-2513846 [Link Remove ...
Crash when opening a sequencer that has an actor with spring controller registered and play in editor
UE - Anim - Runtime - Mar 4, 2021During end play in editor, there is an access violation referencing WorldSettings from SpringBone. In the attached project, the character registered in the sequencer uses the "SpringController" no ...
Crash when AnimBlueprint and Bleuprint Interface has Same Name Function
OLD - Anim - Nov 12, 2019When AnimBP and Blueprint Interface was added to the AnimBP has same name function, compiling AnimBP occur crash. ...
Crash when Matinee with 2 Event Tracks stopped from one of the Event Tracks
Tools - Mar 16, 2015When stopping a Matinee from an Event Track via the level blueprint, if you have 2 Event Tracks the editor will crash. Also Reproduced in Main Promotable-CL-2479729 ...
Crash editor after editing property of TwoBoneIK node
UE - Anim - Rigging - Sep 22, 2021Crashes after editing properties of TwoBoneIK node. If following the reproduction steps, the binding of NodePropertyDelegateHandle will not be removed, causing illegal access on the second editing. ...
Crash When Setting a Bool in a Niagara Parameter Collection via Blueprint
UE - Niagara - Feb 26, 2019The Editor will crash when setting a bool in a Niagara Parameter Collection via Blueprint. Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 5159901, 4.23 CL# 5194133 ...
Crashes occur when executing MRQ while adding UMG with RetainerBox.
UE - Editor - UI Systems - Slate - Sep 9, 2025Create an asset containing a RetainerBox in UMG, then add the created UMG to the viewport using AddViewport. Running MRQ after this causes a crash. ...