1>Engine.generated.cpp.obj : error LNK2019: unresolved external symbol "public: __cdecl UMusicTrackDataStructures::UMusicTrackDataStructures(class FPostConstructInitializeProperties const &)" (??0UMusicTrackDataStructures@@QEAA@AEBVFPostConstructInitializeProperties@@@Z) referenced in function "void __cdecl InternalConstructor<class UMusicTrackDataStructures>(class FPostConstructInitializeProperties const &)" (??$InternalConstructor@VUMusicTrackDataStructures@@@@YAXAEBVFPostConstructInitializeProperties@@@Z)
1>C:\Program Files\Unreal Engine\4.3\Engine\Binaries\Win64\UE4Editor-Engine.dll : fatal error LNK1120: 1 unresolved externals
1>  -------- End Detailed Actions Stats -----------------------------------------------------------
1>ERROR : UBT error : Failed to produce item: C:\Program Files\Unreal Engine\4.3\Engine\Binaries\Win64\UE4Editor-Engine.dll