Unreal Engine Issues
Unreal Engine Issues
Projects crashing on launch after converting from 4.7.3 to 4.7.4
UE - Gameplay - Blueprint - Apr 3, 2015A couple users have reported a crash when opening their 4.7.3 project in 4.7.4. From MikeB:https://answers.unrealengine.com/questions/205043/473-to-474-project-crash-on-startup.html The guy is hit ...
Crash While Running Project With d3ddebug Enabled (fix provided)
UE - Graphics Features - Mar 6, 2017A licensee encountered a crash during InjectTranslucentLightArray: according to them they fixed the issue in ShadowProjectionCommon.usf: /** Cube map texture. */ TextureCube<float> ShadowDepthCub ...
Crash Occurs When Simulating in Editor and Copying Camera Key in One Sequence Then Opening a Second Sequence
UE - Anim - Sequencer - Jan 30, 2018-When opening a sequence while simulating in editor and copying a key and changing sequences leads to a crash -Does not proved callstack - but one is available in the UDN link (See SequencerCrashB) ...
Post Process Animation Blueprint Crash When Using Blend Node
UE - Anim - Runtime - Anim Blueprints - Sep 24, 2025When using a Blend node inside a Post Process Animation Blueprint, the editor crashes while rendering thumbnails. The crash occurs because USkeletonThumbnailRenderer attempts to draw a thumbnail wit ...
Disabling Occlusion Culling and DBuffer Decals causers crash
UE - Graphics Features - Sep 1, 2017THere is a crash that occurs when opening a project after the Occlusion Culling and DBuffer decals option are unchecked. There are times where the Unreal Crash reporter catches the crash and display ...
Crash when Simulating in Editor after Painting Foliage
UE - Editor - Workflow Systems - Nov 29, 2016The engine crashes when simulating in the editor after painting foliage instances using the Foliage Tool. An important thing to note is that this crash does not occur if you switch out of the 'Foli ...
Editor Crashes when importing some FBXs with multiple Material IDs in 4.14.2
UE - Editor - Content Pipeline - Import and Export - Jan 5, 2017This is a regression in behavior between 4.14.1 and 4.14.2! The editor will crash when importing FBX meshes that have multiple material ID assignments. If it's a single material ID it will import w ...
Crash editing Landscape Splines with Level Sequence Open
Tools - Mar 6, 2017A crash occurs when attempting to transform a landscape spline with a Level sequence open. It is important to note that no key framing or animating of the landscape spline control point is occurrin ...
Crashes after destroying a skeletal mesh attached via socket name (not bone name), the destroyed mesh remains welded.
UE - Simulation - Physics - Jul 18, 2025On welding physics bodies during primitive component attachment, UPrimitiveComponent::WeldToImplementation() calls GetRootWelded() and then GetBodyInstance() on the returned root. This searches by b ...
Crash opening FaceARSample on iOS
UE - Platform - XR - Jul 26, 2019FaceARSample is crashing as soon as it is opened on iOS. Tested on a iPhoneXS 12.4. Regression: Yes I was able to get FaceARSample on the same device the previous release 4.22. ...