Unreal Engine Issues

Dataprep Import Causing Unloaded Stream Levels to Reappear in Editor

Using TInlineAllocator with a large number in TArray that is in an AActor class will cause child Blueprint class to call an assert while parent class will not

If a TArray has a TInlineAllocator with a large number and the class is used with a child Blueprint, the editor will throw an assert. If the base C++ Class is used instead of the Blueprint, the asse ...

On attempting to export an Infiltrator Demo animation from the content browser nothing will be created

It seems for some reason that animations from the Infiltrator demo, do not export when export is selected from the content browser. Workaround: However if export is selected from persona the animat ...

VC Runtime not in UnrealLightmass temp directory; causing lightmass build errors

A Redistribute file for VS 2015 is needed to build lightmass, but this is not currently included with the engine. If a user does not have VS 2015 installed, lightmass will fail with this error: Un ...

Using The Draw line node over an image in UMG causes Graphical issues

Using the Drawn line node to draw a line over an image in UMG causes the viewport to display incorrectly. In 4.7 the lines also are not drawn. ...

"If" node in material editor still reads ">=" input, it should read ">"

In the Material Editor, the "If" node recently received a change for an input which now registers as ">" instead of ">=". This node still reads ">=" for that input. ...

Type changes not detected by BP Diff tool

Type changes are not shown as differences in the BP Diff tool. Found on 4.9 by live user (UDN link in additional info URL). ...

BlueprintNativeEvents with no return value (void) cannot be overridden in Blueprints.

BlueprintNativeEvents (and BlueprintImplementableEvents) are not available to be overridden in a Blueprint Graph if they do not return a value. This affects both functions present in source code, as ...

Overridden custom functions have inputs locked when parent actor is altered

Overridden custom functions have inputs locked when parent actor is set to different blueprint type. Regression (no) issue (does) occur in 4.12.5 ...

dragging from wildcard array output to a node with an exec pin changes wildcard to exec variable

dragging from wildcard array output to a node with an exec pin changes wildcard to exec variable. Regression (no) issue (does) occur in 4.12.5 ...