I tried to update my project from 4.10 to 4.12 and i’m not being able to compile it. The error is this one:
Creating library D:\UnrealProjects\BattleSubs\Intermediate\Build\Win64\UE4Editor\Development\UE4Editor-BattleSubs.lib and object D:\UnrealProjects\BattleSubs\Intermediate\Build\Win64\UE4Editor\Development\UE4Editor-BattleSubs.exp
2>BattleSubs.generated.cpp.obj : error LNK2019: unresolved external symbol “public: virtual void __cdecl IGameplayTaskOwnerInterface::OnGameplayTaskActivated(class UGameplayTask &)” (?OnGameplayTaskActivated@IGameplayTaskOwnerInterface@@UEAAXAEAVUGameplayTask@@@Z) referenced in function “class UFunction * __cdecl Z_Construct_UFunction_ABattleSubsHud_HideSplashScreen(void)” (?Z_Construct_UFunction_ABattleSubsHud_HideSplashScreen@@YAPEAVUFunction@@anonymous_user_9674a66c)
2>BTService_AdmiralUpdateQueue.cpp.obj : error LNK2001: unresolved external symbol “public: virtual void __cdecl IGameplayTaskOwnerInterface::OnGameplayTaskActivated(class UGameplayTask &)” (?OnGameplayTaskActivated@IGameplayTaskOwnerInterface@@UEAAXAEAVUGameplayTask@@@Z)
2>BTTask_AdmiralSpawnMedal.cpp.obj : error LNK2001: unresolved external symbol “public: virtual void __cdecl IGameplayTaskOwnerInterface::OnGameplayTaskActivated(class UGameplayTask &)” (?OnGameplayTaskActivated@IGameplayTaskOwnerInterface@@UEAAXAEAVUGameplayTask@@@Z)
2>BTTask_AdmiralSpawnPowerup.cpp.obj : error LNK2001: unresolved external symbol “public: virtual void __cdecl IGameplayTaskOwnerInterface::OnGameplayTaskActivated(class UGameplayTask &)” (?OnGameplayTaskActivated@IGameplayTaskOwnerInterface@@UEAAXAEAVUGameplayTask@@@Z)
2>BTTask_AdmiralSpawnSubmarine.cpp.obj : error LNK2001: unresolved external symbol “public: virtual void __cdecl IGameplayTaskOwnerInterface::OnGameplayTaskActivated(class UGameplayTask &)” (?OnGameplayTaskActivated@IGameplayTaskOwnerInterface@@UEAAXAEAVUGameplayTask@@@Z)
2>BTService_AdmiralUpdateQueue.cpp.obj : error LNK2001: unresolved external symbol “public: virtual void __cdecl IGameplayTaskOwnerInterface::OnGameplayTaskDeactivated(class UGameplayTask &)” (?OnGameplayTaskDeactivated@IGameplayTaskOwnerInterface@@UEAAXAEAVUGameplayTask@@@Z)
2>BattleSubs.generated.cpp.obj : error LNK2001: unresolved external symbol “public: virtual void __cdecl IGameplayTaskOwnerInterface::OnGameplayTaskDeactivated(class UGameplayTask &)” (?OnGameplayTaskDeactivated@IGameplayTaskOwnerInterface@@UEAAXAEAVUGameplayTask@@@Z)
2>D:\UnrealProjects\BattleSubs\Binaries\Win64\UE4Editor-BattleSubs.dll : fatal error LNK1120: 2 unresolved externals
2>ERROR : UBT error : Failed to produce item: D:\UnrealProjects\BattleSubs\Binaries\Win64\UE4Editor-BattleSubs.dll
2> Total build time: 53.01 seconds
2>C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\Microsoft.MakeFile.Targets(37,5): error MSB3075: The command ““C:\Program Files (x86)\Epic Games\4.12\Engine\Build\BatchFiles\Build.bat” BattleSubsEditor Win64 Development “D:\UnrealProjects\BattleSubs\BattleSubs.uproject” -waitmutex” exited with code 5. Please verify that you have sufficient rights to run this command.
I tried analyzing class by class for example:
“2>BattleSubs.generated.cpp.obj : error LNK2019: unresolved external symbol “public: virtual void __cdecl IGameplayTaskOwnerInterface::OnGameplayTaskActivated(class UGameplayTask &)” (?OnGameplayTaskActivated@IGameplayTaskOwnerInterface@@UEAAXAEAVUGameplayTask@@@Z) referenced in function “class UFunction * __cdecl Z_Construct_UFunction_ABattleSubsHud_HideSplashScreen(void)” (?Z_Construct_UFunction_ABattleSubsHud_HideSplashScreen@@YAPEAVUFunction@@anonymous_user_9674a66c)”
UFunction_ABattleSubsHud_HideSplashScreen(void) Is being declared like this on my .h file
/** Function called to hide splash screen created by other huds.*/
UFUNCTION(BlueprintNativeEvent, Category = “Submarine”)
void HideSplashScreen();
virtual void HideSplashScreen_Implementation();
And in the .Cpp file its declared like this only
void ABattleSubsHud::HideSplashScreen_Implementation()
{
//Any Parent Logic Here
}
I’m i missing something? Or was this an issue that ocurred after updating the project some links got broken?