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Question by replay55 · Oct 05, 2015 at 05:52 PM · null reference exception

nullreference exception despite it being attached to the named object??

I am receiving this error:

NullReferenceException: Object reference not set to an instance of an object triggerZone.OnTriggerEnter (UnityEngine.Collider Fireboys) (at Assets/scripts/triggerZone.cs:23)

However, 'Fireboys' is set to 'badcampfire', as seen here:

     void OnTriggerEnter(Collider Fireboys){
             if(Fireboys.gameObject.tag == "Player"){
                 transform.Find("badcampfire").SendMessage("FireCheck");
             }
     }


The object, 'badcampfire', is named appropriately, as seen here:

alt text

So, yeah, I'm at an impasse. What have I done wrong, or, alternatively, what can I do to show off to you guys what I did wrong?

fire.png (357.0 kB)
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Answer by Pharan · Oct 05, 2015 at 06:22 PM

Documentation for Transform.Find says:

Finds a child by name and returns it.

If no child with name can be found, null is returned. If name contains a '/' character it will traverse the hierarchy like a path name.

Is "badcampfire" a child transform of the GameObject this script is on? If not, that's probably why it's returning null, as the documentation says.

Just a hunch.

On a related note, it's probably easier to just get a reference to the script that has the "FireCheck" method and then call it directly. Or maybe it's not...

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