Unreal Engine Issues
Unreal Engine Issues
Import then cancel while file is read leads to potential crash
TM - Interoperability - Oct 6, 20251/ Import a file with mootools such as an fbx 2/ while the file is still read, cancel the import Result : may crash few times after (when theoretically the file has finished being read) - not repr ...
Crash in FMaterialUtilities::CreateFlattenMaterialInstance when building Simplified HLOD layer
UE - World Creation - Worldbuilding Tools - HLOD - Aug 17, 2022From licensee: The issue here starts in FVoxelizeMeshMerging::ProxyLOD() where the FlattenMaterial created using FMaterialUtilities::CreateFlattenMaterialWithSettings() returns an empty struct. I d ...
[AI] Crash when gathering heightfield geometry on worker thread
UE - AI - Navigation - Jun 25, 2025From the body of the ticket: We aim to do as much of the work off the game thread as possible to avoid impacting frame rate. We've recently found a crash during collection of the geometry slices fr ...
Level editor viewports crash when deleting actors after a layout change
UE - Editor - Workflow Systems - Apr 18, 2022Reported by a customer while testing USD import. See additional URL ...
[AI] Crash while loading navmesh with async static mesh compilation enabled
UE - AI - Navigation - Jun 16, 2022I tried 10+ times but am unable to get this to reproduce locally. Licensee reports that this is a rare crash for them. ...
Opening Particle System in Debug Mode will crash Editor
UE - Graphics Features - Sep 11, 2015Running a Project in Debug Mode and attempting to open a Particle System using a DepthFade node in Material will crash the Editor with the message listed in Callstack ...
FBasePassMeshProcessor crashes in ODSC code because the WorldGridMaterial doesn't support translucency
UE - Rendering Architecture - Jan 30, 2023UDN: [Link Removed] Slack: [Link Removed] Then, the return value of TryAddMeshBatch is determined by FBasePassMeshProcessor::Process. When the crash occurs, GetBasePassShaders fails to get the shad ...
UMG - Drag/Drop crash on exit when dropping back onto an old slot.
UE - Editor - UI Systems - Jan 7, 2015When dragging and dropping a widget onto an old slot, it resulted in a crash on exit. ...
Clicking "Pause on Impact" with in the details of the InterpToMovement component will cause a crash
UE - Gameplay - Blueprint - Apr 30, 2015When checking the "Pause on Impact" check box within the details panel for the InterpToMovement component, the editor crashes ...
[CrashReport] Mac crash - libobjc.A.dylib!objc_retain() [UnknownFile]
UE - Platform - Apple - Nov 10, 2017This is a longstanding but low frequency Mac crash. User DescriptionsChanging camera shake values and testing in a new editor window Callstack from Log[2017.11.09-19.23.22:392][ 63]LogMaterial: Mi ...