Blueprint based on custom Vehicle class can't be edited after closing/opening the editor

UE - Gameplay - Blueprint - Sep 8, 2015

If a custom class named Vehicle is used as the base of a blueprint, closing and reopening the editor prevents the blueprint from being opened. The editor reports that the derived class is invalid. ...

Package game fails after creating plugin through editor

Tools - Sep 3, 2015

After creating a plugin in using the New Plugin button in the editor the project will fail to compile. ...

Move Directly Toward Not Working Without NavMesh

UE - AI - May 18, 2016

The Move Directly Toward task does not seem to be working without a Nav Mesh in the level. Based on the tooltip "moves directly to the target without regard to any navigation system", it is expected ...

Attempting to Open a Widget Blueprint With Animation and Timeline Panels Hidden Causes the Editor to Crash

UE - Editor - UI Systems - Nov 11, 2015

When you attempt to open a widget blueprint when you have hidden the animation and timeline panels, the editor will crash. There is a workaround: Window->Reset Layout will allow you to open the blu ...

Cannot Add Collision to an EQS Testing Pawn

UE - AI - Jan 6, 2016

Attempting to add collision to an EQSTestingPawn class is not possible, as the inherited capsule component seems to override any new collision. Simulating with the inherited capsule will cause the P ...

Automatic Animation Compression Results in Crash

OLD - Anim - Dec 1, 2015

Using the "Automatic" option to compress animation results in crash 100% in UE4.10 but does not occur in UE4.9.2. *Regression ...

Packaging for tvOS in Distribution fails to find valid provision

UE - Platform - Mobile - Dec 8, 2016

I was unable to test this due to not having provisions available to test on for tvOS distribution. However, we have reports of the following error: "PackagingResults:Error: Error Provision not foun ...

Destructibles cannot reassign mesh in Level details panel if a Blueprint

UE - Simulation - Physics - Destruction - Dec 9, 2016

Blueprints with a Destructible Mesh component cannot have the mesh changed via the level details panel. It will not accept any new mesh via selection or dragged onto the slot. The Blueprint itself e ...

Cloth environment collisions with APEX clothing is not thread safe.

UE - Simulation - Physics - Character - Jan 17, 2017

This looks like a thread safety bug that's been in the clothing system for a very long time. Essentially a skeletal mesh component does a transform update and attempts to update the collisions of a ...

Removing a key from a Enum Map variable causes duplicate keys to remain

UE - Gameplay - Mar 3, 2017

Removing a key from a Enum Map variable causes duplicate keys to remain. It doesn't seem to happen if the removed key is the first and last key, but only with the middle keys. For example: A (Remo ...