Unreal Engine Issues
Unreal Engine Issues
Assigning a static mesh to a Mutable Clip Mesh With Mesh Node can crash the editor
UE - Anim - Mutable - Jul 4, 2025Context: The Mutable plugin has a modifier node called Clip Mesh With Mesh that allows Static Mesh modifiers to be assigned as the clip mesh. Under certain circumstances, an assert can be triggered ...
A warning is needed for turning off "Update Navigation Automatically", large nav meshes can cause crashes
UE - AI - Jul 7, 2015A warning is needed before allowing users to uncheck update Navigation Automatically. A user has done so and then created a nav mesh that was 1,000,000 by 1,000,000 in size and they can no longer op ...
Crash: Nativized AnimBP instances can assert on load in a cooked build with async loading enabled.
UE - Gameplay - Blueprint - May 9, 2019This is a regression that was introduced alongside a memory optimization for Animation Blueprint assets. Suggested workarounds:Disable "Async Loading Thread Enabled" ORDisable Blueprint nativizati ...
Crash at compile time when using a VariableSet node with a local variable created by pasting a private property
UE - Framework - Blueprint - Oct 7, 2025When a property is created in this way, a local variable with a Private flag is generated. Since such a variable is generally not desirable, it would be better to remove the Private flag upon pastin ...
Alembic Importer does not import the correct amount of curves when using the Minimum Number Of Vertex Influence Percentage setting
UE - Gameplay - Jan 3, 2017This is a regression from 4.14.2 ...
Using ConstructorHelpers::FClassFinder in a GameMode constructor may result in a default value or crash if the level is reloaded multiple times.
UE - Gameplay - Oct 27, 2015Randomly selecting a character class from the GameMode constructor using ConstructorHelpers::FClassFinder can result in default or null character being set when the level is reloaded. It appears tha ...
Using a controller in HTML5 causes error
UE - Platform - Mobile - Mar 17, 2016When using a controller in HTML5, the project crashes within the browser. However, this does not occur on Google Chrome. FireFox/Nightly crashes on launch on as well as packaging and running the pro ...
[CrashReport] libobjc.A.dylib!<Unknown> SEGV_NOOP at 0x0
UE - Platform - Apple - Aug 3, 2015User crashes at "Loading 83%" *See also attached Mac Crash Log. [Link Removed]Launched UE, it crashed upon launch.Ok, a file i wanted to delete, and it just crashed the whole program. Thx.Started e ...
[CrashReport] UE4Editor_Core!FGenericPlatformMemory::OnOutOfMemory() [genericplatformmemory.cpp:161]
UE - Graphics Features - Apr 20, 2017Based on CrashVisualizer data, crashes of this nature are the 4th most common in the 4.15.1 release. This crash may be expected due to the clear messaging that the system is out-of-memory, but this ...
Projects are failing when Content/Pak folders are added outside of the saved folder
UE - Platform - Mobile - Oct 13, 2016When the Content/Pak file is outside of the Saved Folder, it'll crash with an internationalization error. But when the Content/Pak file is inside of the Saved folder, there is not a crash. ...