Why am i getting a null reference exception?

Question

Im getting a null reference exception and i have no idea why.

 void Shoot ()
     {
         RaycastHit2D hit = Physics2D.Raycast(transform.position, transform.right, range, canShoot);
         {
             if (hit != null)
             {
                 hit.collider.gameObject.SendMessageUpwards("HitMe", damage, SendMessageOptions.DontRequireReceiver);
             }
         }
     }

its happening on the line that says hit.collider.gameObject.SendMessageUpwards();

Answer 1

Answer by Kiloblargh · Mar 01, 2014 at 03:12 AM

What if you change if (hit != null) to "`if (hit.collider.gameObject)`", does it ever hit, and does the error go away?

I have never used SendMessageUpwards, so I don't really know its peculiarities. But I regard SendMessage as a sketchy hack. The best solution would be to figure out what failure of design has made the use of a SendMessageUpwards call necessary, and fix that so that you already know exactly what script you are calling "HitMe" on.

Or is "damage" null? That could also be your problem.

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Why am i getting a null reference exception?

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