Unreal Engine Issues
Unreal Engine Issues
UE4Editor does not start when there are no audio devices available
UE - Platform - Linux - Sep 26, 2018UE4Editor does not open when there are no audio input or output devices available. The editor hangs at 83% after it initializes the AudioMixer. This issue looks like it was caused by CL 4396954. Et ...
Unreal Editor 5.4.4 crash when reproducing a LevelSequence in loop while PIE.
UE - Anim - Sequencer - Sep 9, 2024A crash inside Unreal Engine Editor version 5.4.4 occurs when reproducing a Level Sequence while in PIE. This issue is a regression. It only crashes in version 5.4.4. It was working correctly in ver ...
[CrashReport] Fatal Error: Outstanding reference to module 'Renderer' while trying to unload it
UE - Graphics Features - May 30, 2017This crash was previously being tracked in [Link Removed] with a generic "Assertion failed: ModuleInfo.Module.IsUnique()" error message. Ben.M updated that with CL 3376654 and commented: "This cou ...
Control Rig: crashes when compiling after rearranging input pins in an array in Example Rig Unit
OLD - Anim - Aug 20, 2019The crash doesn't occur every time, but it will happen within 3 swap and compiles in my experience. I got multiple different callstacks when I cause the crash using the reproduction steps (they are ...
Packaging Error When Setting Recast Nav Mesh Runtime Generation
UE - AI - Jan 25, 2016Setting the Runtime Generation on the Recast Nav Mesh to a different preset than what is set in the Project Settings causes an error to appear upon trying to package the project, and causes the pack ...
Project Crashes on Open when Implementing An Interface and Its Duplicate
UE - Gameplay - Blueprint - Apr 25, 2016The linked project crashes on open after attempting to implement an interface and a duplicate of that same interface with different function names. This has not been reproduced in a clean project, h ...
CapsuleComponent Shape sometimes reverts to previous value after entering a new value
UE - Foundation - Core - Nov 28, 2014If you manually type in the value for Capsule Half Height, it will sometimes revert back to it's previous value upon hitting Enter. The CapsuleComponent's shape in the Blueprint's Viewport adjust to ...
Potential Memory Leak when frequently terminating and re-initializing FConstraintInstance
UE - Simulation - Core - Mar 29, 2022From User: When frequently terminating and re-initializing the FConstraintInstance, there appears to be a leak when cleaning up the disabled joint, which leads to an ever growing list that gets sort ...
Unable to open UE4Editor on Linux - Bad hlslcc header found
UE - Platform - Linux - Nov 4, 2015UE4Editor does not open on Ubuntu 15.10 due to the following error: [2015.11.04-16.19.35:974][ 0]LogOpenGLShaderCompiler:Error: Bad hlslcc header found! Missing '#'!Error in `./UE4Editor': free(): ...
Lighting data wiped if sub level is hidden while rebuilding lighting for visible levels
UE - Graphics Features - Jan 11, 2017When building lighting now you can no longer have a hidden sub level and have it retain it's built light if it was previously built. For instance, if you have a persistent level and hide the sub-lev ...