Unreal Engine Issues
Unreal Engine Issues
Sampling textures with bias in the path of a custom data pin causes derivative operations when avoidable
UE - Rendering Architecture - Materials - Apr 8, 2025Materials that make use of the analytical derivatives path to avoid hardware derivatives can still generate derivative operations on texture samples when the shading model has a custom data pin and ...
Crash When Changing to Landscape Paint Tool With a Material Function for the World Position Offset of the Landscape Material
UE - Graphics Features - Feb 25, 2019Crash on switching to landscape/paint tab when using a landscape material that has a material function hooked onto the WorldPositionOffset. Working as expected in 4.21 CL# 4753647 Found in 4.22 CL ...
Invalid array length error launching QAGame onto HTML5
UE - Platform - Mobile - Mar 22, 2017Firefox 32-bit Version 52.0.1 This error also occurs in MainRangeError: invalid array length[Learn More] 0943e4e3-83fc-4463-accc-9fd15fd7df6c:157:9 processPackageData blob:http://localhost:53501 ...
Crash saving a destructible mesh after creating it from static mesh
UE - Simulation - Physics - Destruction - Sep 29, 2016Crash occurs when saving a destructible mesh after creating it from a static mesh. ...
Editor cannot handle blueprint structure using an Actor Map variable
UE - Gameplay - Blueprint - Aug 28, 2017If a blueprint structure contains a map variable with Actor Class Reference as the key, populating the map with a custom blueprint (ActorSet) and adding a variable of the structure to any other blue ...
[CrashReport] UE4Editor_MaterialEditor!CastChecked<UMaterialGraphNode,UEdGraphNode>() [casts.h:192]
UE - Rendering Architecture - Materials - Aug 31, 2016This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Descriptions from users are provided below. Error message: Access violation - code c0000005 ( ...
Crash Occurs When Switching Value on TMap
UE - Gameplay - Blueprint - Mar 15, 2017The editor seems to be intermittently crashing when switching the value of a Map variable. I've only been able to get this to occur when switching from one type to a Vector at this time. ...
Crash Upon Sequencer Modification of Actor's Array Variable
UE - Anim - Sequencer - Dec 7, 2018If Sequencer event track modifies an Actor's Integer Variable Array that is exposed to Cinematics, the Editor will crash when the Stop button is pressed. ...
macOS build appears to hang due to UBT deadlocking on ps buffer
UE - Foundation - Cpp Tools - Apr 22, 2021Licensee reports buffer deadlock issue in System/BuildHostPlatform.cs (lines 283-329). Moving Proc.WaitForExit() to after the for-loop seems to resolve the issue for them.publicoverride ProcessInf ...
Crash in blueprints when opening right-click menu
UE - Gameplay - Blueprint - Apr 22, 2015Right clicking inside the event graph of a blueprint that is derived from PhysicsCollisionHandler will crash the editor CrashReporter: [Link Removed] ...