I get this error when i build in Dev editor 64 bit
1>c:\unreal engine 4.5.1\unrealengine-latest-preview\engine\plugins\experimental\steamvr\source\steamvr\private\SteamVRPrivatePCH.h(20): fatal error C1083: Cannot open include file: 'steam/steam_api.h': No such file or directory
1>C:\Unreal Engine 4.5.1\UnrealEngine-latest-preview\Engine\Source\Runtime\Online\OnlineSubsystemSteam\Private/OnlineSubsystemSteamPrivatePCH.h(44): fatal error C1083: Cannot open include file: 'steam/steam_api.h': No such file or directory
1>c:\unreal engine 4.5.1\unrealengine-latest-preview\engine\source\runtime\online\onlinesubsystemsteam\private\OnlineSubsystemSteamPrivatePCH.h(44): fatal error C1083: Cannot open include file: 'steam/steam_api.h': No such file or directory
1> -------- End Detailed Actions Stats -----------------------------------------------------------
1>ERROR : UBT error : Failed to produce item: C:\Unreal Engine 4.5.1\UnrealEngine-latest-preview\Engine\Binaries\Win64\UE4Editor-OnlineSubsystemSteam.dll
1> Cumulative action seconds (6 processors): 0.00 building projects, 219.99 compiling, 0.00 creating app bundles, 0.00 generating debug info, 0.00 linking, 0.00 other
1> UBT execution time: 142.92 seconds
1>C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V120\Microsoft.MakeFile.Targets(38,5): error MSB3073: The command "..\..\Build\BatchFiles\Build.bat UE4Editor Win64 Development" exited with code -1.
========== Build: 0 succeeded, 1 failed, 1 up-to-date, 0 skipped ==========