Unreal Engine Issues
Unreal Engine Issues
Functional Test framework crashes adding delegate instance when multiplayer PIE enabled
UE - Gameplay - Jun 18, 2015The 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 ...
Crash when changing the Codec in a curve compression setting
UE - Runtime - Animation - Nov 15, 2021The crash will occur when changing the Codec in a curve compression setting. This is a regression do it not happening in 4.26.2.. ...
Ongoing D3D 'HUNG' crash - FD3D11Viewport::PresentChecked()
UE - Graphics Features - Jan 18, 2017This is a new ticket for the D3D 'HUNG' crash originally reported in [Link Removed]. Some fixes were introduced in 4.14.2 that decreased the occurrences of this crash, but other cases are still ongo ...
Niagara Crash After Adding More Than 20 Emitters to a System
UE - Niagara - May 24, 2019The Editor will crash after adding more than 20 Emitters to a system. Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 6574378, 4.23 CL# 6599617 ...
Crash When deleting an animation state while it is open in other tab
OLD - Anim - Dec 18, 2018When deleting a state in a state machine while the state is open in another tab the editor will crash ...
Editor crashes when overriding Texture Collection in Material Instance
UE - Rendering - Architecture - Aug 6, 2026When a Material uses the DefaultTextureCollection and a Material Instance overrides it - or vice versa - the Editor will crash. Note: bindlessconfiguration=Minimal or higher must be enabled to use ...
Exception Crash When Moving Files
Tools - Apr 8, 2020Moving files to a sub-folder crashes the editor. ...
Crash when converting a Landscape to a Blueprint Class
UE - LD & Modeling - Terrain - Landscape - Aug 12, 2020The Editor crashes when attempting to convert a Landscape into a Blueprint Class. Looking back to //UE4/Release-4.24 cl 11590231, this option seems to be unselectable (see attached image), which lea ...
Sequence with restore state set is causing a "Fatal world leaks detected" crash
zComponent - Archive - May 14, 2025We recently had a few occurrences of crashes caused by a "Fatal world leaks detected" error when unloading a level (in a packaged game and in editor). I tracked down what was keeping a references t ...
Undoing the pasting of a copied node from the Blueprint Diff tools causes an access violation crash
UE - Gameplay - Blueprint Editor - Aug 24, 2017The editor crashes with an Access Violation if a node that was copied and pasted from the Blueprint Diff tools is removed via an undo. Regression?: No This issue also occurred in 4.16 Branches tes ...