Converting a source built project to 4.10 prevents the project from packaging.

UE - Foundation - Cpp Tools - UnrealBuildTool - Nov 27, 2015

If a project created in a source build of the engine is converted to the source version of 4.10, the project will not compile with a "Missing UE4Game binary" message. ...

Declaring a TMap as a UPROPERTY fails to compile with a boolean

UE - Foundation - Core - Dec 16, 2015

Declaring a TMap< [type], bool> will fail to compile if it is declared as a UPROPERTY. The error seems to be with the bool because TMap< [type], int8> will compile as a UPROPERTY. ...

If a component has been rotated at all, running ComponentSweepMulti on it does not return the correct position of any colliders on the component

UE - Simulation - Physics - May 14, 2015

ComponentSweepMulti does not return the correct location of colliders if the component that is passed in has been rotated at all. The actual collision on the object in the game will be correct. ...

[CrashReport] libobjc.A.dylib!<Unknown> SEGV_NOOP at 0x0

UE - Platform - Apple - Aug 3, 2015

User crashes at "Loading 83%" *See also attached Mac Crash Log. [Link Removed]Launched UE, it crashed upon launch.Ok, a file i wanted to delete, and it just crashed the whole program. Thx.Started e ...

Open Capture Folder does not function on Linux

UE - Platform - Linux - Feb 10, 2016

After capturing a movie in matinee the folder the movie is saved to does not open on Linux ...

Movie capture on Linux cannot be used.

UE - Platform - Linux - Feb 10, 2016

After capturing a movie in matinee the Video Capture folder is not created so the movie does not exist. ...

A pawn with collision set to overlap does not spawn inside a blocking volume with collision set to block.

UE - Gameplay - Sep 10, 2015

When attempting to spawn a pawn (with collision set to overlap) inside a blocking volume (with collision set to block), the pawn will actually spawn at the closest available point outside of the blo ...

Performing a hot reload on a project that contains an FStringAssetReference will crash the Editor.

UE - Foundation - Core - Mar 10, 2015

Performing a hot reload on a project that contains an FStringAssetReference inside a struct results in a crash. This was reported to work fine in 4.6.1, but I was unable to verify that is the case. ...

The crash reporter tool does not start on Windows 8.1 machines when running the Engine built from source code.

UE - Foundation - Core - Dec 5, 2014

The source code to build the Engine that is available from GitHub includes the file dbghelp.dll, which prevents the crash reporter tool from starting on Windows 8.1 machines. This file is not presen ...

Using /*/ to create multiline comments in header files can prevent Visual Studio from successfully building a project.

UE - Foundation - Core - Aug 7, 2015

If a multi-line comment is made in a header file using the format /*/ at the beginning and ending of the comment, UHT will fail to compile the project and will display the following errors: 1> C:/ ...