error LNK2019 Unresolved external symbol

Development Programming & Scripting
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1 
the error is  "protected: void __cdecl AShooterCharacter::OnTime(void)" (?OnTime@AShooterCharacter@@IEAAXXZ) referenced in function "public: void __cdecl AShooterCharacter::GetTime(void)" (?GetTime@AShooterCharacter@@QEAAXXZ)
the error is ` "protected: void __cdecl AShooterCharacter::OnTime(void)" (?OnTime@AShooterCharacter@@IEAAXXZ) referenced in function "public: void __cdecl AShooterCharacter::GetTime(void)" (?GetTime@AShooterCharacter@@QEAAXXZ)

	//this is in the header file
	UFUNCTION()
	void OnTime();
	//this is making error
	GetWorld()->GetTimerManager().SetTimer(JumpTime, this, &AShooterCharacter::OnTime, 0.f, false);
2

I think you are using timer wrong. Try something like this: GetWorld()->GetTimerManager().SetTimer(MyTimerHandle, this, &AShooterCharacter::OnTime, JumpTime, false, 0.0f) and initialize MyTimerHandle like this FTimerHandle MyTimerHandle before setting timer or better have a variable in your header file, so you could clear timer in any other function.

3

I initialize JumpTime as a FTimerHandle. I get 3 error messages and they are about OnTime function but i can’t find what i am doing wrong.

4

@Lawave527 Please check if your OnTime function is a UFUNCTION() in you header file. If not, add UFUNCTION() above. Keep me posted.

5

Yes it is in the header file and it is a UFunction.

6

I fixed it. It isn’t in the .cpp file it is just in the header file so it cannot make the connection with the function.

7

When you are binding to the function in C++, you always initialize your function, which will be called, with UFUNCTION(). Glad, that helped. Please, mark as resolved :slight_smile: