Unreal Engine Issues

Crash when creating deferred decal material when using -d3ddebug command line argument to launch editor

Discovered this while verifying [Link Removed]. Devs informed me of a command line argument that could be used to output D3D11 debug information and using it caused crashes in both //UE4/Main @ CL 3 ...

LIVE: Editor crashes when attempting to use erosion tool on landscape (4.6 preview)

The editor crashes while attempting to use the erosion tool on a landscape in editor. Frequency: 2/2 Callstack: <unknown module>! KERNELBASE!RaiseException() <unknown module>! UE4Editor_Core!FO ...

[CrashReport] Crash on Mac related to cooking for Android - libstdc++.6.dylib!std::_Rb_tree_rotate_left()

This is a common crash on Mac that has occurred since at least 4.12.5. It seems to occur during converting textures while cooking for Android. Callstack from LogLogCook:Display: Cooking /Engine/En ...

Crash when opening a new level while opening Editor Utility Widget after opening and closing it multiple times

Crash when opening a new level with reopened EditorUtilityWidget after opening and closing it multiple times. The cause of this issue is that UEditorUtilityWidgetBlueprint :: UpdateRespawnListIfNee ...

Undoing pasting a component will crash ([CrashReport] UE4Editor_CoreUObject!FWeakObjectPtr::IsValid() [weakobjectptr.cpp:48])

This is a common crash affecting users in 4.16. The callstack is similar to [Link Removed], which was fixed in 4.13. User DescriptionsAccidentally duplicated a blueprint with multiple static mesh ...

Swapping the Child Actor Class of a ChildActorComponent back to a previously selected BP leads to an Editor crash from illegal Renaming

A fatal error occurs if we change a Child Actor Class from one BP (ex. "BP_A") to a different BP ( ex. "BP_B") and later change it back to the first BP (ex. "BP_A") without compiling the BP between ...

Launching Android project to device results in Assertion Failed: AsyncLoading.cpp, Line 3710

After updating to 4.25.1 from 4.25 Packaged Android game crashes constantly with objects added to the map 4.25 Packaged game did not crash (editor did a lot but glad thats fixed in 4.25.1) Empty map ...

Editor will crash while instancing nested AIPerception component template subobjects in an AIController-based Blueprint class during compile-on-load.

User report of an assertion that fires on editor reload during an attempt to reload an AIController-based Blueprint class with a dependency on a child Blueprint class, both created in a previous edi ...

Automation Wait for Loading crashes standalone game

Reproduced 3/3 times, issue also occurs in //UE5/Release-5.0 - CL 20979098 Binary. Confirmed NOT a Regression. ...

DX12 crash when fullscreen app looses focus.