I am not for sure, how important this is, but.
BpLibraryTest.generated.h
Is not being generated, ever. Or at least the compiler cannot find it, if it is included, in BpLibraryTest.h
Here is the error output from the compiler.
Compiler Error Output
1>------ Build started: Project: BcBpLibraryV1_1, Configuration: Development_Editor x64 ------
1> Compiling game modules for hot reload
1> Performing 4 actions (4 in parallel)
1> [2/4] Link UE4Editor-BcBpLibraryV1_1-7112.dll
1> Creating library G:\Epic.Submission\BcBpLibraryV1_1\Intermediate/Build/Win64\UE4Editor\Development\UE4Editor-BcBpLibraryV1_1-7112.lib and object G:\Epic.Submission\BcBpLibraryV1_1\Intermediate/Build/Win64\UE4Editor\Development\UE4Editor-BcBpLibraryV1_1-7112.exp
1> PCH.BpLibraryTestPrivatePCH.h.cpp
1>G:\Epic.Submission\BcBpLibraryV1_1\Plugins\BpLibraryTest\Source\BpLibraryTest\Public\BpLibraryTest.h(7): fatal error C1083: Cannot open include file: ‘BpLibraryTest.generated.h’: No such file or directory
1> -------- End Detailed Actions Stats -----------------------------------------------------------
1>ERROR : UBT error : Failed to produce item: G:\Epic.Submission\BcBpLibraryV1_1\Plugins\BpLibraryTest\Binaries\Win64\UE4Editor-BpLibraryTest-5154.dll
1> Total build time: 39.13 seconds
1>C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V120\Microsoft.MakeFile.Targets(38,5): error MSB3073: The command ““G:\unreal4.launch\Epic Games\4.9\Engine\Build\BatchFiles\Build.bat” BcBpLibraryV1_1Editor Win64 Development “G:\Epic.Submission\BcBpLibraryV1_1\BcBpLibraryV1_1.uproject” -rocket -waitmutex” exited with code -1.
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
Hope this helps,