Setting PHYSX_MEMORY_STATS to 1 prevents the Engine from being built successfully.

UE - Simulation - Physics - Mar 9, 2015

If #define PHYSX_MEMORY_STATS 0 is set to 1, the Engine will not build successfully. The build fails with the message: error C2338: FPhysXAllocationHeader size must be less than 16 bytes. ...

Error when quitting Launch on session - A null object was passed as a world context object to UEngine::GetWorldFromContextObject().

UE - Gameplay - Jun 20, 2017

The following errors occur when the user quits a Launch On session from the editor:LogPlayLevel: QAGame: [2017.06.20-16.26.03:085][292]LogScriptCore: Error: Script Msg: A null object was passed as a ...

Crash when creating a Niagara Emitter

UE - Graphics Features - Apr 28, 2017

Crash when creating a Niagara Emitter Another CrashReport: [Link Removed] Not sure if regression because the process to enable Niagara in 4.15 seems to be different than in 4.16, and I'm not sure ...

[CrashReport] UE4Editor_Engine!FHLSLMaterialTranslator::GetParameterUniformExpression() [hlslmaterialtranslator.h:1671]

UE - Graphics Features - May 25, 2017

This is a top trending crash in the 4.16 release. This may be a regression from 4.15. Additional information is currently unknown. Users have not provided any details. ...

[CrashReport] UE4Editor-CoreUObject.dylib!FArchiveAsync2::Serialize() when cooking for iOS on Mac

UE - Platform - Mobile - Jul 27, 2017

This is a Mac cooking for iOS commandlet crash that has occurred occasionally for some users in 4.16. Example Command Line (PII removed)/Users/---/Desktop/---/---.uproject -run=Cook -NoLogTimes -T ...

Editor crash on loading a project after enabling the Tango plugin on Linux

UE - Platform - Linux - Aug 22, 2017

Enabling the Tango plugin on Linux causes the editor to crash on restart. Regression: No - Tango plugin not available in 4.16.3 (CL 3561208) ...

Character Mesh transform replication break on clients

UE - Networking - Jul 3, 2017

In 4.16, character mesh on clients seem to be in the different location than the server. So far this happens when the player start is above the ground. This does not happen when network Smoothing ...

Crash Occurs Enabling new Audio Mixer with Audio Devices Disabled

UE - Audio - May 25, 2017

If a user has all their audio devices disabled, and then enables the new audio mixer for 4.16, a crash occurs when trying to launch any new or existing project. This is a regression as this crash d ...

[CrashReport] Crash on Mac - UE4Editor-Slate.dylib!FTextLayout::GetAsTextAndOffsets()

UE - Platform - Apple - Jul 17, 2017

This is a common crash occurring for Mac users on the 4.17 Preview, and a few cases in 4.16. I have been unable to find any matching reports of this crash on Windows. There is a slight variation in ...

Crash: Opening Project Browser from Launcher with VR Mode auto-entry enabled with HMD active (worn)

UE - Editor - Workflow Systems - Apr 24, 2017

If you enable VR Mode auto entry, close the project, and then attempt to launch the engine again from the Binary launcher while the HMD is active (being Worn), the Project Browser will crash ...