Unreal Engine Issues
Unreal Engine Issues
Project Crashes on UAIPerceptionComponent::RegisterStimulus()
UE - AI - Apr 26, 2016Assertion failed: (Index >= 0) & (Index < ArrayNum) [Link Removed] [Line: 785] Array index out of bounds: 2 from an array of size 2 Source Context: 363 return OwnerController->GetPawn(); ...
Duplicated Matinee Actors cause compile errors with Controllers in Level Blueprint
UE - Gameplay - Blueprint - Jan 5, 2015Duplicating a Matinee Actor after having its controller placed in the Level Blueprint and then adding a controller into the Level Blueprint will cause a compile error on compile. *This error will s ...
Character animations do not replicate when the character is attached to another actor
UE - Networking - Feb 10, 2015Character animations do not replicate when the character is attached to another actor. Setting the other actor to Replicate and Replicates Movement does not seem to make any difference. Reproduced ...
Overlap events do not trigger on landscapes
UE - LD & Modeling - Terrain - Landscape - Sep 24, 2015Overlap events do not fire on landscapes ...
Reimporting static mesh with static mesh editor window open will cause crash
Tools - Jun 12, 2015When generating a collision box for a static mesh and reimporting the mesh with the static mesh editor window open will result in a crash. [Link Removed] ...
Projects crash on Android when trying to load mips
UE - Platform - Mobile - Jan 20, 2017Projects that are deployed in the Debug configuration crash when trying to load mips on the Android device. I do not see this issue when launching a project onto Android using the Test configuratio ...
Mac ShooterGame crashes when loading into the match with Pak files
UE - Platform - Apple - Feb 15, 2017ShooterGame crashes when loading into the match on Mac when that ShooterGame was packaged with Pak files. The ShooterGame project was created using the Unreal Engine Launcher I do not see this is ...
Precomputed Visibility incorrectly Culling Objects in Scene when Opening different Level
UE - Graphics Features - Jun 28, 2017Objects in a scene are randomly culled when building a level with Precomputed Visibility enabled, and opening another level that has already pre-built precomputed visibility. A couple of things wor ...
Procecdural Mesh Components without a material assigned crashes on conversion to Static Mesh
UE - Graphics Features - Aug 6, 2019This bug doesn't occur in 4.21. The issue is at line 157 in ProceduralMeshComponentDetails.cpp . When the procedural mesh has a material the crash doesn't occur. File location: Runtime/ProceduralMe ...
Path Tracer Normals Issue
UE - Graphics Features - Path Tracer - Oct 29, 2025Path Tracing normal maps reflect light differently than Lit, and do not look accurate. Also observed in //UE/Release-5.6, CL: 45232827 ...