Cannot call a function from another class! No errors UE4 just closes itself

Development Programming & Scripting C++
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17

Okay AnDarra, try this:

AEnemyActor * EActor; //Create a variable, which is a pointer to a AEnemyActor class

if(HitResults->GetActor() )
{
    if( Cast<AEnemyActor>(HitResults->GetActor()) )
    {
        EActor = Cast<AEnemyActor>(HitResults->GetActor());
        EActor->ApplyDamage();
                 GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Red, FString::Printf(TEXT("Applied damage to %s !"), *HitResults->GetActor()->GetName());

    }
    else
    {
         GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Red, FString::Printf(TEXT("Could not cast actor %s to AEnemyActor !"), *HitResults->GetActor()->GetName());
    }
}

You could get errors, I just typed it on my phone. Let me know how you go.