Unreal Engine Issues
Unreal Engine Issues
Crash When Copying Comment Box from a Blueprint to a Behavior Tree
UE - AI - Jun 8, 2016The editor crashes when pasting a comment box from a blueprint into a behavior tree. Found in 4.12.1 binary. Reproduced in 4.11.2 binary and Main CL 3005971 Source Context94 95 fo ...
Materials with Subsurface Profile not affected by Opacity value
UE - Graphics Features - Oct 24, 2017A material with Shading Model set to Subsurface Profile is no longer affected by Opacity value in 4.17, 4.18, and 4.19 (Main) but was previously working as intended in 4.16. This is a regression. ...
[CrashReport] Assertion failed: Array index out of bounds - GetPhysicsTriMeshData() [modelcomponent.cpp:688]
UE - Simulation - Physics - Oct 30, 2017This is a semi-common crash that has occurred since at least 4.17.1. The callstack is nearly identical to [Link Removed], which was fixed in 4.18.0, however the error message and source context are ...
Custom Depth range is different than Pixel Depth range
UE - Rendering - Features - Sep 25, 2025Shaders that compare custom depth and pixel depth get wrong output values because the ranges are different. This error is most noticeable over large distances. The difference in ranges is due to t ...
Player Character does not collide with landscape
UE - LD & Modeling - Terrain - Landscape - Mar 8, 2015UPDATE: 3/9/2015 Additional Information: User on thread https://answers.unrealengine.com/questions/186928/landscape-collison-issues-recreatelandscapecollisi.html reported workaround did not fix e ...
Custom iOS icons don't appear on device for Windows BP projects (Binary Build)
UE - Platform - Mobile - May 4, 2018iOS icons have stopped working for Windows BP projects again; this does not occur on Mac. It also does not occur when using a source build from p4 (only on a binary build from the launcher). Note t ...
Crash Occurs When Generated Item Type Doesn't Match Return Type
UE - AI - Jan 7, 2016After creating the example generator that is displayed at the bottom of the documentation linked below, a crash will occur if the Generated Item Type is set to EnvQueryItemType_Actor (which is the d ...
"Current state is a conduit and will reset to ref pose" warning when using a conduit to select an entry state
UE - MVF Character - Animation - Dec 12, 2022AnimBlueprintLog: Error: Current state is a conduit and will reset to ref pose. This can happen if a conduit is an entry state and there isn't at least one valid transition to take. State Machine(Te ...
Inconsistent behavior with spawned actors when Play, Pause, and Stop are called in a Level Sequence Player
UE - Anim - Sequencer - Feb 15, 2017This is a report about three different issues that are tightly related to each other, so I decided to include them in a single report. The behavior of actors spawned by a Level Sequence Player is no ...
[CrashReport] FIntroTutorials::AnalyticsEventNameFromTutorial()
Tools - Jul 6, 2017This is a common crash that appears to have started in the 4.16.1 hotfix, but has occurred with more frequency in 4.16.2. User DescriptionsAfter the blueprint tutorial, I pressed "play", pressed ES ...