Animation System relies on FindFunctionByName which is not thread safe.

OLD - Anim - Mar 29, 2017

Currently, there are several places in FAnimInstanceProxy and FAnimNode_Base (and derived classes) that rely on FindFunctionByName in order to resolve transitions, evaluate pins, etc. This can happ ...

Behavior Tree marked as changed on open when containing Run Behavior node

UE - AI - Mar 29, 2017

When a behavior tree contains a Run Behavior node, opening the behavior tree marks the asset as "modified" and users would get asked by the editor if they want to save it even when there has been no ...

Listen Server Without Microphone Will Drop Clients with Microphone if Voice is Enabled

UE - Networking - Mar 28, 2017

Listen servers that do not have a microphone hooked up are dropping clients that do have microphones when the client attempts to transmit voice. The log contains the following errors: [2017.03.28- ...

[CrashReport] UE4Editor_VisualStudioSourceCodeAccess!TComPtr<IDispatch>::operator->() [compointer.h:107]

Tools - Mar 27, 2017

*This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Descriptions from users are provided below. Error message: Assertion failed: RawPointer != n ...

Actor Attached On Begin Play Offset on Client When Using SnapToTarget

UE - Networking - Mar 27, 2017

When attaching an Actor during its BeginPlay, using SnapToTarget (when that location is not already matched up to the parent) creates an offset on the client. ...

Packaging a Project With Nativize Blueprints Enabled Fails With Setter for an Array of Classes

UE - Gameplay - Blueprint Runtime - Mar 23, 2017

Packaging failure occurs with nativize blueprints enabled when you have an array of classes and you try to set it with an array from an instance of a native C++ class. Found in 4.15.1. Reproduced i ...

Touches on windows generate 2 mouse events.

UE - Editor - UI Systems - Slate - Mar 22, 2017

The problem is that windows supplies both a touch event and a mouse event for each touch. The engine then handles touches as mouse input so that UI elements can work correctly on touch platforms. ...

Assert message in TArray::CheckAddress is not appropriate for all situations

UE - Foundation - Core - Mar 21, 2017

The assert message in CheckAddress is as follows:"Attempting to add a container element (%p) which already comes from the container (%p, ArrayMax: %d, ArrayNum: %d, SizeofElement: %d)!" This assert ...

[CrashReport] Crash can occur when applying Apex cloth to a Material slot

UE - Simulation - Physics - Character - Mar 21, 2017

No known crash with users I had been in contact with on the latest PhysX plugin for 3dxMax or Maya. I've had a few posts dealing with using Apex and assigning cloth assets with no crashing so I feel ...

Clearing text property from a Text widget won't work the first time

UE - Editor - UI Systems - Mar 21, 2017

It currently takes two attempts to clear the default text from a Text Block widget. The first time you try, the property will repopulate with the previous string. ...