I can confirm that Lightmass fails to build and seems to be the cause. I spent the entire day nuking/formating all my harddrives and reinstalling the entire system from scratch, and the exact same problem occures with a fresh install of Windows 7 (all updates) and Visual Studio 2015 community (all updates)…
Need assistance as soon as possible. Will try to work with binary build meanwhile, but I really really need the source build to work properly.
The same compile errors are given for Lightmass in visual studio once again:
Severity Code Description Project File Line Suppression State
Error MSB3073 The command "..\..\Build\BatchFiles\Build.bat UnrealLightmass Win64 Development -waitmutex" exited with code -1. UnrealLightmass C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\Microsoft.MakeFile.Targets 37
Error C3861 '_mm_cvtpu8_ps': identifier not found UnrealLightmass h:\unrealengine-release\engine\source\programs\unreallightmass\private\lightmasscore\math\LMMathSSE.h 586
Error C3861 '_mm_cvtpu8_ps': identifier not found UnrealLightmass h:\unrealengine-release\engine\source\programs\unreallightmass\private\lightmasscore\math\LMMathSSE.h 586
Error C3861 '_mm_cvtpu8_ps': identifier not found UnrealLightmass h:\unrealengine-release\engine\source\programs\unreallightmass\private\lightmasscore\math\LMMathSSE.h 586
Error Failed to produce item: H:\UnrealEngine-release\Engine\Binaries\Win64\UnrealLightmass.exe UnrealLightmass H:\UnrealEngine-release\Engine\Intermediate\ProjectFiles\ERROR 1