Modules tab is "unrecognized" if editor restarts with it open

Tools - Apr 16, 2015

If you open the Modules tab and then close the editor and reopen it, where the modules tab was now becomes an "unrecognized tab". [Image Removed] ...

Generating Lightmap UVs doesn't automaticly switch LightMapCoord Index

Tools - Jul 17, 2015

When Import a meshes then open the staticmesh editor and turn on the "Generate Lightmap UVs" in the Build Settings. Then hit apply button to genereate the Lightmaps. It will generate the Lightmap bu ...

FText::AsTime Does not work correctly with daylight savings.

UE - Editor - UI Systems - Localization - Mar 17, 2016

If you pass the result of FDateTime::UTCNow in into FText::AsTime with your windows time zone currently set to Eastern Time (UTC-5 hours), it will NOT take into account daylight savings. ...

ENGINE: CRASH: One off Editor Crash with ANavLinkProxy::GetComponentsBoundingBox() navlinkproxy.cpp:189

UE - AI - Oct 20, 2016

One off editor crash. [Link Removed] Error Message Access violation - code c0000005 (first/second chance not available) Call Stack of Most Recent Crash ANavLinkProxy::GetComponentsBoundingBox() na ...

SlateRemote: Message serialization does not take byte order and struct packing into account

UE - Foundation - Cpp Tools - Plugin System - Sep 15, 2016

The message serialization code in SlateRemoteServer should use FArchives for de-/serializing its messages. The current implementation is not platform/compiler agnostic. ...

ShowOnlyInnerProperties (Meta UPROPERTY tag) doesn't work in some cases

Tools - Apr 30, 2015

ShowOnlyInnerProperties doesn't work when the struct in question is either in an array or in an outer struct in an array. (There may be other broken cases as well.) Example: USTRUCT() struct Str ...

"Unreal Match 3" Demo Stuck While Syncing

Docs - Samples - Apr 5, 2016

When attempting to download/sync to the UE4.11 version of "Unreal Match 3" sample from the Learn Tab on the launcher, the download button is "grayed out" and instead says "Syncing." Selecting the ...

FOnlineSessionLive leaves inconsistent state when FindSessions or CreateSession fail.

UE - Networking - Nov 28, 2016

FOnlineSessionLive::CreateSession creates the session early into the method. Later, the method can fail but the session and is never cleared up (see the various catch statements in the tasks which o ...

Localization code incorrectly retrieves ManifestName rather than AcrhiveName

UE - Editor - UI Systems - Localization - Dec 19, 2016

In FTextLocalizationResourceGenerator::GenerateAndUpdateLiveEntriesFromConfig() lines 216-222 are meant to get the Archive Name. However line 218 appears to be a copy of line 210 and is set to Mani ...

Vectorized and Non-Vectorized FTransform Accumulate are inconsistent with Blendweights

UE - Foundation - Core - Jan 11, 2017

The vectorized version of FTransform::Accumulate and FTransform::AccumulateWithAdditiveScale3D only blend the rotation, but not the translation or scale. This is divergent behavior from the non-vec ...