Unreal Engine Issues
Unreal Engine Issues
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 enabling Shader Complexity Viewmode
UE - Graphics Features - Oct 11, 2022Material Editor Assertion Crash When Collapsing Material Attributes
UE - Rendering Architecture - Materials - Jul 14, 2022Collapsed material attribute nodes cause an editor assertion crash in the material editor when viewed or opened. Assertion failed: (Index >= 0) & (Index < ArrayNum): Array index out of bounds: 0 fr ...
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. ...
Crash launching UE4Editor.exe from cmd.exe with -dx12 argument
UE - Graphics Features - Feb 3, 2017My Nvidia driver is our current approved driver: 378.49 ...
ARCore fails to package due to permission error with ARKit enabled
UE - Platform - XR - Jan 17, 2019When using the handheld AR template and trying to package for ARCore, the package or launch on attempt will fail due to some permissions errors with Apple. If ARKit is disabled the editor will lock ...
Crash when baking materials for some skeletal meshes (like those found in Epic's Car Configurator project)
Tools - Jun 22, 2021FMeshMergeHelpers::RetrieveMesh crashes when trying to prep some skeletal meshes for material baking. ...
Crash after removing decal (using set fade out node) during design time and then hitting play
UE - Gameplay - Blueprint - Feb 5, 2019When calling set fade out on a decal during design time via a custom event that is setup to be called in editor a crash will occur when clicking PIE ...
Crash when generating proxy mesh
Tools - Jul 12, 2019Generating a proxy mesh with imported models and the simplify mesh flag set to true causes the editor to crash. Tested in 4.21.2 (CL - 4753647), 4.22.3 (CL - 7053647), 4.23 (CL - 7288428), 4.24 (CL ...