I have recently used UE4.19 and I was able to run my project properly. Then I tried to upgrade the project to UE4.20 and keep getting error module are missing, when I try to build them it says to rebuild from source.Below are the error I have been getting from the VS2017 error list.
The project could not be compiled. Would you like to open it in Visual Studio?
Running C:/Program Files/Epic Games/UE_4.20/Engine/Binaries/DotNET/UnrealBuildTool.exe Development Win64 -Project=“C:/Users//Documents/Unreal Projects/VRtestNOcalibration 4.20/VRtestNOcalibration.uproject” -TargetType=Editor -Progress -NoHotReloadFromIDE
Creating makefile for VRtestNOcalibrationEditor (no existing makefile)
Performing full C++ include scan (no include cache file)
Using Visual Studio 2017 14.15.26726 toolchain (C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.15.26726) and Windows 10.0.16299.0 SDK (C:\Program Files (x86)\Windows Kits\10).
C:\Users\Documents\Unreal Projects\VRtestNOcalibration 4.20\Plugins\UPupilLabsVR\Source\UPupilLabsVR\UPupilLabsVR.Build.cs: warning: Referenced directory ‘C:\Program Files\Epic Games\UE_4.20\Engine\Source\UPupilLabsVR\Public’ does not exist.
@progress push 5%
Parsing headers for VRtestNOcalibrationEditor
Running UnrealHeaderTool “C:\Users\Documents\Unreal Projects\VRtestNOcalibration 4.20\VRtestNOcalibration.uproject” “C:\Users\Documents\Unreal Projects\VRtestNOcalibration 4.20\Intermediate\Build\Win64\VRtestNOcalibrationEditor\Development\VRtestNOcalibrationEditor.uhtmanifest” -LogCmds=“loginit warning, logexit warning, logdatabase error” -Unattended -WarningsAsErrors -installed
Reflection code generated for VRtestNOcalibrationEditor in 9.9373837 seconds
@progress pop
Building 11 actions with 8 processes…
@progress ‘Compiling C++ source code…’ 0%
@progress ‘Compiling C++ source code…’ 9%
[1/11] PCLaunch.rc
@progress ‘Compiling C++ source code…’ 18%
[2/11] PCLaunch.rc
@progress ‘Compiling C++ source code…’ 27%
[3/11] SharedPCH.Engine.cpp
@progress ‘Compiling C++ source code…’ 36%
[4/11] VRtestNOcalibration.cpp
@progress ‘Compiling C++ source code…’ 45%
[5/11] dummyctoopenvisual.cpp
@progress ‘Compiling C++ source code…’ 55%
[6/11] UE4Editor-VRtestNOcalibration.lib
Creating library C:\Users\Documents\Unreal Projects\VRtestNOcalibration 4.20\Intermediate\Build\Win64\UE4Editor\Development\VRtestNOcalibration\UE4Editor-VRtestNOcalibration.lib and object C:\Users\Documents\Unreal Projects\VRtestNOcalibration 4.20\Intermediate\Build\Win64\UE4Editor\Development\VRtestNOcalibration\UE4Editor-VRtestNOcalibration.exp
@progress ‘Compiling C++ source code…’ 64%
[7/11] Module.UPupilLabsVR.gen.cpp
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winnt.h(584): warning C4005: ‘TEXT’: macro redefinition
c:\program files\epic games\ue_4.20\engine\source\runtime\core\public\HAL/Platform.h(884): note: see previous definition of ‘TEXT’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(7542): error C4668: ‘_WIN32_WINNT_WIN10_TH2’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(7548): error C4668: ‘_WIN32_WINNT_WIN10_RS1’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(7553): error C4668: ‘_WIN32_WINNT_WIN10_TH2’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(7557): error C4668: ‘_WIN32_WINNT_WIN10_TH2’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(7564): error C4668: ‘_WIN32_WINNT_WIN10_RS2’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(7574): error C4668: ‘_WIN32_WINNT_WIN10_RS2’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(7578): error C4668: ‘_WIN32_WINNT_WIN10_TH2’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(7583): error C4668: ‘_WIN32_WINNT_WIN10_RS3’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(7777): error C4668: ‘_WIN32_WINNT_WIN10_RS2’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(12249): error C4668: ‘_WIN32_WINNT_WIN10_RS3’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(12266): error C4668: ‘_WIN32_WINNT_WIN10_RS3’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(12285): error C4668: ‘_WIN32_WINNT_WIN10_RS2’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(12404): error C4668: ‘_WIN32_WINNT_WIN10_RS3’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Users\Documents\Unreal Projects\VRtestNOcalibration 4.20\Plugins\UPupilLabsVR\Source\ThirdParty\msgpack\Includes\msgpack/predef/other/endian.h(151): error C4668: ‘MSGPACK_ARCH_AMD64’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/array_ref.hpp(262): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/array_ref.hpp(267): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/map.hpp(204): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/map.hpp(210): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/vector.hpp(98): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/vector.hpp(103): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/vector_char.hpp(35): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/vector_char.hpp(40): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/vector_char.hpp(48): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/vector_char.hpp(53): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/vector_unsigned_char.hpp(35): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/vector_unsigned_char.hpp(40): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/vector_unsigned_char.hpp(48): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/vector_unsigned_char.hpp(53): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
@progress ‘Compiling C++ source code…’ 73%
[8/11] Module.UPupilLabsVR.cpp
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winnt.h(584): warning C4005: ‘TEXT’: macro redefinition
c:\program files\epic games\ue_4.20\engine\source\runtime\core\public\HAL/Platform.h(884): note: see previous definition of ‘TEXT’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(7542): error C4668: ‘_WIN32_WINNT_WIN10_TH2’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(7548): error C4668: ‘_WIN32_WINNT_WIN10_RS1’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(7553): error C4668: ‘_WIN32_WINNT_WIN10_TH2’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(7557): error C4668: ‘_WIN32_WINNT_WIN10_TH2’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(7564): error C4668: ‘_WIN32_WINNT_WIN10_RS2’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(7574): error C4668: ‘_WIN32_WINNT_WIN10_RS2’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(7578): error C4668: ‘_WIN32_WINNT_WIN10_TH2’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(7583): error C4668: ‘_WIN32_WINNT_WIN10_RS3’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(7777): error C4668: ‘_WIN32_WINNT_WIN10_RS2’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(12249): error C4668: ‘_WIN32_WINNT_WIN10_RS3’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(12266): error C4668: ‘_WIN32_WINNT_WIN10_RS3’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(12285): error C4668: ‘_WIN32_WINNT_WIN10_RS2’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Program Files (x86)\Windows Kits\10\include\10.0.16299.0\um\winioctl.h(12404): error C4668: ‘_WIN32_WINNT_WIN10_RS3’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
C:\Users\Documents\Unreal Projects\VRtestNOcalibration 4.20\Plugins\UPupilLabsVR\Source\ThirdParty\msgpack\Includes\msgpack/predef/other/endian.h(151): error C4668: ‘MSGPACK_ARCH_AMD64’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/array_ref.hpp(262): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/array_ref.hpp(267): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/map.hpp(204): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/map.hpp(210): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/vector.hpp(98): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/vector.hpp(103): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/vector_char.hpp(35): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/vector_char.hpp(40): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/vector_char.hpp(48): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/vector_char.hpp(53): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/vector_unsigned_char.hpp(35): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/vector_unsigned_char.hpp(40): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/vector_unsigned_char.hpp(48): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
c:\users\documents\unreal projects\vrtestnocalibration 4.20\plugins\upupillabsvr\source\thirdparty\msgpack\includes\msgpack/v1/adaptor/vector_unsigned_char.hpp(53): error C4668: ‘GNUC’ is not defined as a preprocessor macro, replacing with ‘0’ for ‘#if/#elif’
ERROR: UBT ERROR: Failed to produce item: C:\Users\Documents\Unreal Projects\VRtestNOcalibration 4.20\Plugins\UPupilLabsVR\Intermediate\Build\Win64\UE4Editor\Development\UPupilLabsVR\UE4Editor-UPupilLabsVR.lib
(see …/Programs/UnrealBuildTool/Log.txt for full exception trace)
Total build time: 59.05 seconds (Parallel executor: 0.00 seconds)