Unreal Engine Issues

Map placed actor binding to another actor's Event Dispatcher (multicast delegate) results in duplicate bindings after blueprint recompile

Context Blueprint actors placed on the map can bind to another actor's event. If an ActorB has a reference to ActorA, it can bind to an event dispatcher in A by creating an event node in ActorB's e ...

Cull Distance Volumes do not effect Blueprints or Skeletal Mesh Actors

CHANGELIST: 2181118 BRANCH: UE4 https://udn.unrealengine.com/questions/166371/cull-distance-volume-bug.html DESCRIPTION: Cull distance volumes don't seem to cull blueprints or meshes inside a bluep ...

UbaAgent in 5.7 depends on qwave.dll, which is not available on Server Core

A licensee runs UbaAgent on Windows Server Core. This worked in 5.5 and 5.6, but broke in 5.7. After some investigation, they found that UbaAgent took a new (hard) dependency on qwave.dll in order ...

In the Anim Sequence Editor set a Notify's MontageTickType to be fixed to BranchingPoint if that Notify is a Native Branching Point

To avoid confusing users when working with a Native Branching Point Notify set its MontageTickType to be fixed to BranchingPoint.  ...

"Fix root motion initial rotation handling" commit breaks root motion completely

Enabling and processing root motion causes animation to rotate the wrong direction. Roll instead of Yaw. Pitch instead of roll etc. This error does not occur in UE 4.6. ...

Fix up redirectors can fail if some packages were already checked out

Fix the skeletal mesh merge tool material assignment, change the API to avoid confusion

UDN user ask us to change the API for the material to remove confusion with the material ID. Also apparently there is an issue with the skeletal mesh merge tool, the user did not give any repro ste ...

Deleting a large number of unused variables from blueprints forces desktop to windows 7 basic mode until editor is closed

Deleting a large number of unused variables from a blueprint forces the editor into windows 7 basic mode until the editor is closed. ...

Level Bounds Incorrectly Calculated If Particle System Does Not Have "Use Fixed Relative Bounding Box" Enabled

If "Use Relative Fixed Bounding Box" is disabled, level bounds will be incorrectly calculated. This seems to be similar to [Link Removed]. Found in 4.19 CL# 4033788, 4.20 CL# 4212847, 4.21 CL# 4233 ...

Crash converting code project 4.7 to 4.8 ; Array index out of Bounds

Some users are experiencing a crash when converting their project from 4.7 to 4.8. From user reports it appears to be affecting those who have added code to their projects and created blueprints bas ...