Unreal Engine Issues
Unreal Engine Issues
Editor reports crashes and terminates for exceptions that would otherwise be cleared by structured exception handlers
UE - Foundation - Core - CrashReportClient - Jun 8, 2020In 4.25.1, I added a vectored exception handler to capture unhandled exceptions to the Editor process. This handler runs too soon. It doesn't let the structured exception handlers run first where ma ...
[CrashReport] Assertion failed: NewWorld | UE4Editor_Engine!UEngine::LoadMap()
UE - Gameplay - Nov 2, 2017This is a common and longstanding crash that has occurred since at least 4.15. Originally this was being tracked under [Link Removed] due to sharing the same callstack, but that had specific repro ...
Crash Opening Editor with Vulkan - Fatal Error - RenderingThread.cpp
UE - Rendering Architecture - RHI - Mar 15, 2019Editor crashes when opening to project browser on Linux. Fatal error: [File:D:\Build\++UE4\Sync\Engine\Source\Runtime\RenderCore\Private\RenderingThread.cpp] [Line: 819] Rendering thread exceptio ...
Placed level instance causes "!ActorInstanceGuid.IsValid()" assertion after changing WorldSettingsClass
UE - World Creation - Worldbuilding Tools - Level Instances - Nov 13, 2023Resaving the level using ResavePackagesCommandlet is a workaround. ...
Changes to Instanced Properties default value on BP not propagated to placed actors in the opened level
UE - Foundation - May 15, 2025In UE versions 5.4 and onwards (as of CL 42589677 in Main), when an Instanced UObject property is defined in an Actor Blueprint, modifying the default value in the Blueprint does not propagate the c ...
Revision Control > View Changes: Request for changes to Revert File and Unsaved options
UE - Editor - Workflow Systems - Sep 22, 20251. Objects in the Unsaved list cannot be discarded, only saved. The only options to discard changes are restarting UE or manually locating each resource and clicking Reload. This becomes extremely c ...
Package fails after adding DesktopPlatform to public module dependency list
UE - Foundation - Core - Apr 6, 2017Adding DesktopPlatform to the PublicDependencyModuleNames.AddRange() section of the Project.Build.cs file causes the project to fail packaging with the following error (full package logs in callstac ...
Crash on checking event track key property after setting static mesh reference element
UE - Anim - Sequencer - Oct 19, 2017Event track key with a structure containing staticmesh reference. Setting the staticmesh then reopening the property crashed the editor. ...
UPrimitiveComponent mouse events when underneath Slate widgets not correct
UE - Editor - UI Systems - Slate - Jan 7, 2016Licensee is adding a widget to the viewport overlay via AddViewportWidgetContent(). The widget receives mouse input when hovered. They return unhandled from all their widget's onmouse functions and ...
Source control syncing in editor will sometimes not update changes made to assets
Tools - Aug 25, 2015When using source control and attempting to sync the project, sometimes assets are not updated to the latest changes properly. This causes changes made to those assets later to override previous ch ...