UBT crashes when doing an incremental build

UE - Foundation - Cpp Tools - UnrealBuildTool - Aug 9, 2017

There is a consistent crash when incrementally compiling headers containing generated code. The code for launching UHT accesses a property which is null when compiling with the UBT makefile. ...

Action event in the blueprint graph leads to state dirty.

UE - Gameplay - Blueprint - Aug 9, 2017

BP state get dirty if the BP graph have action input event. Regression: Yes, it is not reproduced in 4.16.3 This issue is not related to Blueprint Compilation Manager. ...

Compilation manager inhibit construction script to get other actor reference on the level when running construction script right after actor compile.

UE - Gameplay - Blueprint - Aug 9, 2017

Construction script execution following blueprint compile gets invalid actor reference if Blueprint compilation manager is enabled. For example, in the attached project, Right after blueprint compi ...

Make Dialogue Context node no longer has the speaker and targets options exposed

UE - Gameplay - Blueprint - Aug 8, 2017

The Make struct node for Make Dialogue Context no longer has the "Speaker" and "Targets" pin exposed. ...

Blueprint Editor: BP functions display dropdown instead of checkboxes for uint8 enum parameters

UE - Gameplay - Blueprint Editor - Aug 8, 2017

I traced through the callstack and it looks like the problem is as follows:in order for the BP function to compile, its enum parameter must be uint8, because that is the only type supported by BP fu ...

LOD Build Scale set higher than 1 will cause a merged actor to increase to that scale when created

OLD - Anim - Aug 8, 2017

LOD Build Scale set higher than 1 will cause a merged actor to increase to that scale when created. It seems to be using the LOD Build Scale to double in size on actor merge. This is a regression: ...

Scroll bar jumps to the top of the window when changing Output Log 'Categories' checkboxes

Tools - Aug 8, 2017

When the Categories dropdown is changed in the Output Log, the scroll bar will jump to the top of the page. This does not match the behavior of using the search bar which will keep the scroll bar a ...

Physics Substepping doesn't have the same effect from 4.15 to 4.16

OLD - Anim - Aug 8, 2017

Physics Substepping doesn't have the same effect from 4.15 to 4.16. In 4.16+ the ponytail in the provided project will have a jitter effect even with substepping enabled. This is a regression: Work ...

Replace actor does use previous actors location in folder structure for the world outliner

Tools - Aug 8, 2017

When using the replace actor feature in the editor, the new actor is not placed in the folder location of the actor that was replaced. As in the example above, the Actor2 that replaced Actor1 is not ...

Distortion Displacement Track is empty in new level sequence using a distortion file with a framerate of 0

Docs - Samples - Aug 8, 2017

Distortion Displacement Track is empty in a new level sequence using a distortion file witha framerate of 0. ...