Blender FBXs import wrong number of bones which causes issues with Apex Cloth files

Tools - Jan 6, 2016

First of all, I'm not sure this is an issue with UE4, but I'm not familiar with Blender to rule this out. A user has reported an issue when importing a Rigged mesh from Blender it will add an addi ...

MFI Gamepad support on Mac

UE - Platform - Apple - Jan 27, 2020

We are supporting a few controller on Mac (they can be seen in HIDInputInterface.cpp) but since Catalina it is possible to use the same GameController API as in iOS. This is an important feature fo ...

Error packaging Android after disabling Vulkan Support

UE - Platform - Mobile - Systems - Jan 3, 2023

Regression: Tested in UE5/Release-5.0, this issue does not occur and is a regression. This issue occurs when packaging for Android ASTC, ETC2, and DXT. Packaging with Support Vulkan enabled results ...

Failed check() when placing large numbers in to a From Seconds node and print them to the screen

UE - Gameplay - Blueprint - Apr 10, 2017

Crash when placing a number >= 922337181697 in to a From Seconds node and print them to the screen ...

Missing space for Support UV From Hit Result setting Project Settings

UE - Gameplay - Aug 4, 2016

In the Project Settings, there is a typo for the Support UV From Hit Result Setting. There is a missing space between "UV" and "From". ...

UEnum::NumEnums appears to be returning one more than the actual number of elements in an enum.

UE - Foundation - Core - Jan 6, 2015

A user reported that UEnum::NumEnums appears to be returning one more than the actual number of elements in the enum. ...

UHT "Type TArray is not supported by blueprint" error message is ambiguous

UE - Foundation - Cpp Tools - UnrealHeaderTool - Jan 11, 2019

An overly generic error message is produced when you have a TArray UProperty that contains a non-blueprint friendly type. For example: UPROPERTY(EditAnywhere, BlueprintReadWrite, editfixedsize) TA ...

Event Dispatcher implementation called several times (number of bound refs increases every compile)

UE - Gameplay - Jun 26, 2018

The number of calls to the Event Dispatcher increase each time the blueprint actor containing the reference is compiled. This issue was not present in 4.18.3 (CL-3832480) but is in 4.19.2 (CL-403378 ...

Crash when using Find Substring node if the starting position is higher than the number of characters in the string being searched

UE - Gameplay - Blueprint - Jul 17, 2017

If the "Start Position" in the "Find Substring" node is larger than the number of characters in the "Search in" field a crash will occur. ...

Performance decreases with the number of morph targets

UE - ACT Character - Control Rig - Jun 15, 2023

Performance decreases quite a bit on characters with large number of morph targets, as soon as even one target is active.  ...