Why am i getting a null reference exception?

Questions & Answers
1

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();

2

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.