Unreal Engine Issues
Unreal Engine Issues
Download of Starter pack sometimes fails
TM - Core - Sep 11, 2025Crash in FLandscapeRenderSystem on Mobile
UE - Graphics Tools - Terrain - Landscape - Aug 4, 2021Similar issues have already been reported here for iOS [https://udn.unrealengine.com/s/question/0D52L00004vJelTSAS/crash-ios-in-flandscaperendersystemcomputesectionperviewparameters] and here [https ...
Error when exporting OBJ unattended
UE - Editor - Content Pipeline - Import and Export - Dec 1, 2020When doing an unattended OBJ export with python. The export will fail and give the atteched callstack. ...
[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 ...
Assets are invalidated if named or renamed with a leading underscore
UE - Editor - Content Pipeline - Content Browser - Jan 12, 2017Renaming or naming assets with a leading underscore invalidates the asset. The assets will be renamed to "None" and report occupying 1KB in space. It is no longer possible to interact with an object ...
Cannot key font material for UMG Widget animations
UE - Anim - Sequencer - Sep 14, 2023Crash launching QAGame onto Windows
UE - Graphics Features - Mar 23, 2017The editor is crashing when launching onto windows. This is not occurring in Main. ...
KiteDemo: Failed to load Outer for resources
Docs - Samples - May 3, 2017While testing KiteDemo for 4.16 Sample Pass – //UE4/Release-4.16 CL 3420042 in Binary – Two warnings occurred when opening the project.LoadErrors:Warning: Warning CreateExport: Failed to load Outer ...
Editor lock on destructible mesh spawn
UE - Simulation - Physics - Destruction - Mar 1, 2016Spawning an actor during TG_PrePhysics is added to TG_StartPhysics which leads to the editor locking up when multiple actors are spawned. ...
Problem importing broken FBX
UE - Editor - Content Pipeline - FBX - Nov 25, 2021An FBX exported from 3DEXCITE DELTAGEN fails to parse correctly in the latest FBX SDK and crashes the UE importer. This FBX is automatically repaired when loaded into Maya (citing "polygons with ov ...