ATan is not available in a Math Expression

UE - Gameplay - Blueprint - Mar 10, 2015

Using a Math Expression node, atan will generate an error as an unknown expression. Reproduced in Main Promotable-CL-2471062 [Image Removed] ...

Changing the value of a text struct variable inside a duplicated function that contains a Make Struct node will reset that value in the original function

UE - Gameplay - Blueprint - Mar 11, 2015

Changing the value of a text struct variable inside a duplicated function that contains a Make Struct node will reset that value in the original function. This does not appear to occur with other va ...

EQS Query Not Detecting Different Floors

UE - AI - Jul 7, 2016

Running an EQS for something such as finding a random point on a grid will not generate results on multiple floors. See the attached screenshot for an example. Was unable to reproduce in 4.11.2 d ...

Dynamic Parameters do not function in Beam Emitters

UE - Graphics Features - Apr 10, 2015

Transfered Issue from TTP # 298314, originally opened in TTP on 6/3/2013 and updated with Answerhub post information on 5/18/2014 Dynamic Parameters cannot be used with a Beam Emitter, they pass no ...

Walking on an actor with a Spring Arm in the 3rd Person BP template will cause the camera to jitter

UE - Gameplay - Apr 10, 2015

Walking on an actor with a Spring Arm in the 3rd Person BP template will cause the camera to jitter/skip. This does not happen with an actor that does not have a spring arm and it also does not hap ...

Setting "Is Enabled" via the animation timeline in UMG does not appear to work at runtime

UE - Editor - UI Systems - Jun 10, 2016

Setting "Is Enabled" via the animation timeline in UMG does not appear to work at runtime ...

MAC: Crash on startup

UE - Platform - Apple - Apr 10, 2015

"MacBook pro 13 2015 with yosemite 10.10.3 just crashed after launching ue4." The problem is that the recently introduced calls to IsRHIDeviceNVIDIA occur before the Mac code sets the GRHIVendorID ...

PerceptionSystem crashing on removing a listener as part of DestroyActor call

UE - AI - Apr 14, 2015

User reported a crash in UAISense_Hearing::OnListenerRemovedImpl when perception listener is being removed as a response to DestroyActor call. ...

profilegpu should not crash when run on mobile platforms

UE - Platform - Mobile - Apr 15, 2015

We don't have gpu timings on mobile/tiled gpus so we should just print a message that says that is not supported; right now it'll crash trying to run a shader. ...

Copying a call to a Custom Event or Function in another Blueprint and pasting it in the Blueprint the Custom Event or Function comes lives in will cause a compile warning or failure

UE - Gameplay - Blueprint - Apr 17, 2015

Copying a call to a Custom Event or Function in another Blueprint and pasting it in the Blueprint the Custom Event or Function comes lives in will cause a compile warning or failure. In 4.7.5 it giv ...