Unreal Engine Issues

Crash when adding Rectangle Lights to a game with multiple players while Raytracing is enabled

A user reported this issue to us through Salesforce. They initially said it crashed with both Spot Lights and Rectangle Lights, but I was only able to repro with Rectangle lights. Additionally, I di ...

[Synth][Tone Generator] - Editor crashes when Starting Synth Component Tone Generator

Starting a SynthComponentToneGenerator crashes the editor with the following assert:Assertion failed: bSuccess [File:D:\build\++UE5\Sync\Engine\Source\Runtime\SignalProcessing\Private\AudioBufferDis ...

Project packaged on Windows for Linux crashes after exiting on Linux

I noticed this after packaging multiple samples projects on Windows for Linux and running them on my Linux machine. The project exited cleanly, but there was a crash and callstack generated in the ...

Water_Material crashes editor when adding "Scene Depth Without Water" node

/std:c++17 key is hidden in generated .vcxproj after adding it to the BuildConfiguration.xml

As far as I can tell this is a regression. After including C++17 in the build configuration it shouldn't be hidden in the .vcxproj? ...

Set Members in Struct node doesn't work if the Struct is contained within an Array

Set Members in Struct node doesn't work if the Struct is contained within an Array. ...

Crash occurs when duplicating a State Machine in the My Blueprint panel within an Animation blueprint

This is not a regression. Tested in //UE4/Release-4.27 CL18319896 Crash occurs when duplicating a State Machine in the My Blueprint panel within an Animation blueprint. ...

[CrashReport] UE4Editor_Slate!SMultiBoxWidget::GetCustomizationVisibility() [multibox.cpp:931]

This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Descriptions from users are provided below. Error message: Assertion failed: Result == FPrope ...

Setting max undilated frame time to a negative value crashes the editor

In the world settings of any level, changing the max undilated frame time to a negative number results in the editor crashing. ...

Unresponsive black screen in standalone when enabling HMD w/ Oculus attached

Going fullscreen/stereo on/enableHMD causes a play in standalone to go unresponsive and render as a black screen. Found on: Binary 4.9.2 release (from launcher/portal) UDN: https://udn.unrealengin ...