Сrash UE4 when creating an instance of an object

Development Programming & Scripting C++
1

Hi Guys,

I’m new and I have a problem:

I create an instance of any class, even empty in some function called via the keyboard in the game. When I press the button, the UE4 crashes. Maybe the instances cannot be created in Character.cpp?

2

New objects must be created in a valid package and must have a valid outer.
If you break any of the above rules then engine crashes.

3

Well, how can I find out if my object is in a valid package and how can I move it there?

4

Set outer as current level’s UWorld is an easy step.

5

There is a chance that your instance got automatically garbage collected ? You should try to use persistent data variables, so they don’t get away out of memory block, which can make the engine unstable and crashes

6

The fact is that I create an instance of an absolutely empty class just created, in which there is no garbage!

7

Here are some screenshots showing the problem.

8

You can’t create an Actor that way. You need to use SpawnActor. Actor’s aren’t trivially constructed objects.



void ATestCharacter::CollectHP()
{
  AExem* NewExemInstance = GetWorld()->SpawnActor<AExem>(AExem::StaticClass(), GetActorTransform());
}
9

Get used to Unreal crashing a lot, sometimes for not-so-obvious reasons. I recommend installing the debug symbols so you at least have a stacktrace to debug. In this case, it looks like the error has already been pointed out, but it is one of those things where Epic could do some sanity-checking on their part and log an error instead of letting the editor/game crash.