I have the very same problem. First everything was fine. I could compile the editor from the sourcecode and run it. After that I subscribed to the CryEngine EaaS program and installed VS2012 Ultimate instead of VS2013Pro. Then I wanted to compile UE4 again but with VS2012 and I couldnt get it to run so I installed VS2013 Express in parralel to VS2012 but still I could not get the code to be compiled. I tried everything possible. deleted the solution files and cleaned the build and generated the project files again. Nothing works. After all I deinstalled every IDE and only installed VS2013 Pro again but now I cant get the sourcecode to be build no matter what. I always end up with this error:
Fehler 2 error C1083: Datei (Include) kann nicht geöffnet werden: “metahost.h”: No such file or directory D:\UnrealEngine\Engine\Source\Editor\SwarmInterface\Private\SwarmInterface.cpp 19 1 UE4
Fehler 3 error : Failed to produce item: D:\UnrealEngine\Engine\Binaries\Win64\UE4Editor-SwarmInterface.dll D:\UnrealEngine\Engine\Intermediate\ProjectFiles\ERROR UE4
Fehler 4 error MSB3073: Der Befehl “…\Build\BatchFiles\Rebuild.bat UE4Editor Win64 Development” wurde mit dem Code 2 beendet. C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V120\Microsoft.MakeFile.Targets 43 5 UE4