Destroying GameObject from inside FSM

[noio]

I’m trying to destroy the object that controls the FSM (in order to upgrade him to another unit type).

Simple, in theory:

But I keep getting this error:

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NullReferenceException: Object reference not set to an instance of an object NodeCanvas.StateMachines.FSM.OnGraphUpdate () (at Assets/NodeCanvas/Modules/StateCanvas/FSM.cs:72) ParadoxNotion.Services.MonoManager.Update () (at Assets/NodeCanvas/Framework/_ParadoxNotion (shared)/Runtime/Services/MonoManager.cs:51)

I have also tried to put the “Destroy(gameObject)” call inside the method ( PromoteFromFSM() ), but the same thing happens.

I used to have a workaround:

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IEnumerator DestroyLater() {     yield return null;     Destroy(gameObject); }

But this extra frame of waiting time was causing _other_ trouble. I’d rather just destroy “right away”.

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[Gavalakis]

Hello,

Please add a null check for the currentState at line #72:

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if (currentState != null && currentState.status == Status.Running && CallbackStay != null) CallbackStay(currentState);

The DestroyGameObject action is created to be called in the Update method of the action (instead of OnExecute) and exactly before the line of error, the current state Update is called, and thus the problem.

I’ve tested with the null check now and works as expected, but let me know.

Thanks!

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[noio]

Thank you so much! You are unbelievably fast 😀

By changing this, does that mean it’s possible to call Destroy(gameObject) from ‘generic’ ExecuteFunction actions too?

[Gavalakis]

You are welcome and thanks 🙂

Yeah. I just tested this to confirm and works fine 🙂

Cheers!

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