Moving existing source code into new project

Development Programming & Scripting
1

Hey,

To put it simply, I’ve created a new project named the same as my exisiting one, a C++ 2D side scroller, and coppied the Source folder from my exisiting project into the new one. I know all the code comiples fine but when I try and build from the .uproject or inside Visual Studio it fails due to:

2>Module.Test2D.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __cdecl UUserWidget::UUserWidget(class FObjectInitializer const &)" (__imp_??0UUserWidget@@QEAA@AEBVFObjectInitializer@@@Z) referenced in function "public: __cdecl UAbilityBar::UAbilityBar(class FObjectInitializer const &)" (??0UAbilityBar@@QEAA@AEBVFObjectInitializer@@@Z)
2>Module.Test2D.gen.cpp.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: __cdecl UUserWidget::UUserWidget(class FObjectInitializer const &)" (__imp_??0UUserWidget@@QEAA@AEBVFObjectInitializer@@@Z)
2>Module.Test2D.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __cdecl UUserWidget::AddToViewport(int)" (__imp_?AddToViewport@UUserWidget@@QEAAXH@Z) referenced in function "public: virtual void __cdecl ATest2DPlayerController::BeginPlay(void)" (?BeginPlay@ATest2DPlayerController@@UEAAXXZ)
2>Module.Test2D.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __cdecl UUserWidget::SetOwningPlayer(class APlayerController *)" (__imp_?SetOwningPlayer@UUserWidget@@QEAAXPEAVAPlayerController@@@Z) referenced in function "public: void __cdecl ATest2DCharacter::SpawnWidgets(void)" (?SpawnWidgets@ATest2DCharacter@@QEAAXXZ)
2>Module.Test2D.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: static class UUserWidget * __cdecl UUserWidget::CreateWidgetOfClass(class UClass *,class UGameInstance *,class UWorld *,class APlayerController *)" (__imp_?CreateWidgetOfClass@UUserWidget@@SAPEAV1@PEAVUClass@@PEAVUGameInstance@@PEAVUWorld@@PEAVAPlayerController@@@Z) referenced in function "class UBasicHUD * __cdecl CreateWidget<class UBasicHUD>(class APlayerController *,class UClass *)" (??

I’ve tried using Generate VS Files from the .uproject, cleaning, updating the engine, updating VS 2017. But my old project still works.

I’m Using UE 17.1 and VS 2017.

2

I tried comparing the folder to my existing project folder with beyond compare, and there was almost no differences. Unless I’m wrong, I’m pretty sure the source folder has no head references to anything and should be drag drop