iOS package with Metal Desktop Renderer enabled crashes on iPhone

UE - Rendering - Architecture - RHI - Oct 11, 2024

iOS package with Metal Desktop Renderer enabled crashes on iPhoneThis issue does not occur if Metal Desktop Renderer is disabled ...

Crash when changing r.MaterialQualityLevel when FastGeo plugin enabled in cooked build

UE - World Creation - Worldbuilding Tools - Sep 5, 2025

The engine crashes when the r.MaterialQualityLevel is changed in a cooked game that uses the FastGeo Streaming Plugin. The crash doesn't repro with the same steps in Editor, just in a cooked build. ...

EDITOR: CRASH: Saving a project while an auto save is occurring will crash the Editor.

Tools - Aug 1, 2014

If a user initiates a save using Ctrl+S while an autosave is in progress, the Editor will crash. CRASHREPORT: [Link Removed] ...

Crash when launching a packaged project where a code class gets a reference to a Blueprint widget that contains an instance of a Blueprint struct

UE - Gameplay - Blueprint - Aug 3, 2017

A packaged project will crash on launch if a code class uses ConstructorHelpers::FClassFinder to get a reference to a Blueprint Widget that contains a Blueprint struct variable. Disabling EDL in the ...

Adding a code class to a blueprint project causes the editor to crash

UE - Foundation - Core - Oct 5, 2017

Adding a code class to a blueprint project causes the editor to crash after attempting to hot reload. This only occurs for a fully bluprint project, code projects or BP projects that have already h ...

iPadOS AR App Crashes when ARKit's "Use Scene Depth for Occlusion" is Enabled

UE - Platform - XR - Dec 13, 2024

Does not crash in 5.4 on same hardware so looks like a regression. Attached Unreal logs indicate source of critical error: 'FARKitCameraOverlayMobilePS' shader uniform expression set mismatched sh ...

Editor crash when opening Project Settings on Linux

UE - Platform - Linux - Mar 29, 2017

When the Project Settings is opened on Linux, a call is made to run an iOS-related C# program (execute iPhonePackager certificates). This call causes the editor to crash. Unable to find mention of ...

LIVE: EDITOR: MATERIALS: CRASH: Setting the MipValueMode for MipLevel or MipBias to 4 or higher will crash the editor

UE - Graphics Features - Oct 14, 2014

BRANCH: MAIN CHANGELIST: 2322258 PLATFORM: Windows DESCRIPTION: When using a texture sample with the MipValueMode to MipLevel or MipBias with a value of 4 or higher will cause a crash. ...

WP HLOD Crash on Small Cell Sizes

UE - World Creation - Worldbuilding Tools - HLOD - Jan 8, 2024

Fatal Error: Cast of Package to AnimGraphNode_BlendSpaceGraphBase failed when deleting an opened Blendspace node in a State graph

UE - Anim - Runtime - Anim Blueprints - Aug 10, 2021

When deleting a Blendspace or Blendspace 1D node in a state graph, after opening it, the editor crashes. It doesn't crash when deleting it before opening the Blendspace node. It also doesn't matter ...