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

DevTools - 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. ...

Target.cs file not located in game Source directory leads to DLLs in Engine directory

DevTools - UnrealBuildTool - Nov 24, 2015

A user has discovered that if the editor target cs file is located in an out of the ordinary directory, the dlls are built to the engine directory instead of the game directory. ...

UBT not terminated when cancelling build

DevTools - UnrealBuildTool - Nov 1, 2015

When cancelling a build from Visual Studio, UBT keeps running, and another build is generally not possible until one kills the UBT process manually in Task Manager. ...

Building the Engine using Visual Studio 2015 can fail if Windows Driver Kit is installed.

DevTools - UnrealBuildTool - Oct 26, 2015

There is a possible logic bug in Visual Studio 2015's vcvarsqueryregistry.bat where it locates the include path for the Universal CRT by looking at the last folder in the specified location. This se ...

UnrealBuildTool: UBTMakefile is not outdated with .uplugin files are modified

DevTools - UnrealBuildTool - Oct 15, 2015

.uplugin files define module dependencies, and if new modules are added, the Makefile needs to be regenerated. --Mike ...

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

DevTools - UnrealBuildTool - Oct 14, 2015

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 ...

Compile errors when building full solution for Development Win64

DevTools - UnrealBuildTool - Sep 29, 2015

Per email conversation, entering this in as a single bug ...

Upgrading a code project from 4.8 to 4.9 results in the startup project in the Visual Studio solution changing from the game project to the UE4 project.

DevTools - UnrealBuildTool - Sep 22, 2015

Upgrading a code project from 4.8 to 4.9 results in the selected startup project in the Visual Studio solution changing from the game project to the UE4 project. This results in unexpected behavior ...

Changes to code during a compile are not registered if compile is canceled/restarted

DevTools - UnrealBuildTool - Jul 31, 2015

While the editor is compiling a hot reload, if project code is changed and the compile is canceled, code changes are not reflected upon next editor compile. ...

Build error when compiling a code project with the word "Engine" as the last word of the title

DevTools - UnrealBuildTool - Mar 9, 2015

When naming a project ending with "Engine" whether there is a "_" or no space separating the name will result in a build error in VS. See attached image for error output. ...