Unreal Engine Issues

Editor crash when calling SGridPanel::SetRowFill

Calling SGridPanel::SetRowFill on an actor's BeginPlay causes the editor to crash with the callstack provided The reporter mentioned SetRowFill uses if() statement where SetColumnFill uses while() ...

Unreal 4.26 Crashes when playtesting with a groom in the scene

When you hit play with a groom in the scene, the engine crashes Additional notes: First tried adding it to a skeletal mesh through a character blueprint. Engine crashes. Engine doesn't crash if pla ...

Importing Camera FBX into a sequence can crash with a headless editor

In a headless editor instance we will not be able to send toasts to the user, and we should not notify slate. The Sequencer Tools function library calls MovieSceneToolHelpers::ImportFBXCameraToExist ...

Unloading a spawned Detour AI Controller using Level Streaming causes a crash

In a Level Streaming setup, unloading a level that has spawned an AI Character with a Detour AI Controller causes a crash. This was reported and tested in 4.23 (CL-8386587). This was reproduced in ...

Crash enabling Async Scene and opening level in editor

This is a regression from 4.14.3 at CL 3251583 ...

Crash - console command stat none

Engine Crash when Running a Screenshot Functional Test

Running a Screenshot Functional test, is causing an engine crash. By attaching a debugger to it, AScreenshotFunctionalTestBase::PrepareForScreenshot() is reached and GEngine->GameViewport is null, ...

Access Violation crash deleting a Widget Blueprint with an unsaved Animation track - FSequencer::Tick()

Encountered an Access Violation crash while deleting an Widget Blueprint with an unsaved Animation Track. The callstack references FSequencer::Tick(). I was not able to reproduce this issue in UE4/ ...

Crash in Blueprint when clicking on Component variable name that remains after Component was deleted

This is a common crash in 4.16 and trending in the 4.17 previews. It can be reproduced by clicking on the name of a variable that remains listed in a Blueprint after the associated component has al ...

Crash related to Vertex Painting - MeshPaint!CastChecked<AActor,UObject>()

This crash was reported on the UDN. Upon further investigation it has been experienced by a handful of different users throughout 4.11 and 4.12. JIRA logged for tracking despite unknown repro steps ...