Unreal Engine Issues
Unreal Engine Issues
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 ...
Automation Wait for Loading crashes standalone game
UE - Automation Test - Jan 5, 2023Reproduced 3/3 times, issue also occurs in //UE5/Release-5.0 - CL 20979098 Binary. Confirmed NOT a Regression. ...
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. ...
BP - Nativization will fail at cook time if a BP class and a User-Defined Structure reference each other.
UE - Gameplay - Blueprint - Apr 20, 2017Note: This happens with "Exclusive" nativization mode as well. This occurs because the nativized UDS 'GetDefaultValue()' method is generated into a .h file rather than a .cpp file. This creates a c ...
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 Trying to Find a Blueprint Class with Niagara Particles
UE - Niagara - May 22, 2019Crash When Trying to Find a Blueprint Class with Niagara Particles Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 6574378, 4.23 CL# 6599617 ...