If a hot reload is performed after adding a custom UserDefinedEnum class to the project, the Editor will crash.

UE - Foundation - Core - Nov 17, 2015

Performing a hot reload in the Editor after adding a custom UserDefinedEnum C++ class to a project results in a crash. A normal compile in Visual Studio will complete successfully. ...

Crash When Building HLODs

UE - World Creation - Worldbuilding Tools - HLOD - Aug 21, 2019

Building HLODs causes a crash. This only seems to occur in some levels as shown in the attached project. Found in 4.22 CL# 7053642, 4.23 CL# 7948402, 4.24 CL# 8124506 ...

Editor crashes when assigning Landscape layer info while Forward Shading is enabled

UE - LD & Modeling - Terrain - Landscape - Nov 7, 2017

Crash occurs when Forward Shading is enabled in Forward Rendering Options User noted that if "Support Stationary Skylight" in Project Settings > Rendering > Shader Permutation Reduction is disabled ...

Functional Test framework crashes adding delegate instance when multiplayer PIE enabled

UE - Gameplay - Jun 18, 2015

The Functional Test framework crashes when adding a delegate instance if multiplayer PIE is enabled. The crash occurs at the check code in the block below from ..\Engine\Source\Runtime\Core\Public\D ...

Copy, Paste and Hover a Material Layer Blend Node causes Crash

Tools - Jun 25, 2015

In the Material Editor, if all Live Previews are turned off, copying and pasting a Material Layer Blend Node will crash when the tool tip is being processed. Also Reproduced in Main Promotable-CL-2 ...

Opening a widget blueprint on Linux causes editor to crash

UE - Platform - Linux - Aug 25, 2016

The editor crashes when attempting to open a widget blueprint. ...

Crash when enabling Shader Complexity Viewmode

UE - Graphics Features - Oct 11, 2022

Using the output from FindAllPakFiles to call StreamableManager::RequestAsyncLoad causes a crash

UE - Foundation - Core - Apr 22, 2016

A user has reported a problem where the directory that is output from FindAllPakFiles is not compatible with the StreamableManager::RequestAsyncLoad function and will cause a crash if using the two ...

Crash when writing WPO using SceneDepth

UE - Rendering Architecture - Materials - Feb 25, 2022

MDL imported from Substance Source with Datasmith causes a crash

UE - Editor - Content Pipeline - Import and Export - Mar 8, 2019

MDL downloaded from Substance Source causes a crash. This is reported on UDN by an Enterprise customer: https://udn.unrealengine.com/questions/487598/why-would-ue4-is-always-crashing-when-import ...