Weapon Issues - RaycastHit.rigidbody causing an error

(First off, as a side note, can a developer please allow copying out of the error console?)

OK. I've got a ray being cast to represent a gun firing. Everything about this ray is working well - it hits the proper position, creates a spark where it's supposed to.

I added the following:
if (BHit.rigidbody) {
BHit.rigidbody.AddForceAtPosition(Vector3.Normalize(target.position - transform.position)*Force, BHit.point);
}

Whenever the gun hits an object with a rigidbody, I get the error: NullReferenceException: Object reference not set to an instance of an object

This error points to the line containing "if (BHit.rigidbody) {"

My code, as far as I can discern, is conceptually identical to the code used to accomplish the same effect in the FPS tutorial, and I'm stumped as to what this error means and why it's coming up. Does anyone have any ideas?

 

Alright.

The script works in conjunction with another script that puts the target object (which represents a lasersight) where the player is aiming. It casts a ray in the direction of that object. It creates a spark, and, if the object it hits is a rigidbody, applies some force to it....in theory. Then it plays a sound.

The rigidbody part is the only malfunctioning part of this script.

Code (csharp):

1. var target :Transform; //this should be a lasersight object as used in MouseAim
2. var SparkObject : GameObject;
3. var Force = 25.0;
4. var audioSource : AudioSource;
5. var SoundEffects : AudioClip[]; //picks one of these effects at random
6.  
7. function Update () {
8.     if (Input.GetMouseButtonDown(0)) {
9.         var BHit : RaycastHit;
10.    
11.         Physics.Raycast(transform.position, (target.position - transform.position), BHit);
12.        
13.         var s = Instantiate(SparkObject, BHit.point, Quaternion.LookRotation(BHit.normal));
14.         Destroy(s, 0.5);
15.        
16.         if (BHit.rigidbody) {
17.             BHit.rigidbody.AddForceAtPosition(Vector3.Normalize(target.position - transform.position)*Force, BHit.point);
18.         }
19.        
20.         //AUDIO
21.         if (SoundEffects.length > 0) {
22.            
23.             var thisSound = SoundEffects[Random.Range(0,SoundEffects.length)];
24.             audioSource.PlayOneShot(thisSound);
25.  
26.         }
27.     }
28. }

 

No, the error occurs on the line with the if statement - even if the AddForceAtPosition line is commented out, I still get the error.

 

If you comment out the entire if statement do you still get the error?

 

I think I've found the source of the issue, though according to the documentation it should work fine. Anytime I touched BHit.transform, even in

Code (csharp):

1.  if (BHit.transform)

, it would trigger this error. I've worked around it by using BHit.collider instead.

BHit.rigidbody seems to be problematic too, so I started using BHit.collider.attachedRigidbody. My code now looks like

Code (csharp):

1.  
2.             if (BHit.collider.attachedRigidbody) {
3.                 BHit.collider.attachedRigidbody.AddForceAtPosition(Vector3.Normalize(target.position - transform.position)*Force, BHit.point);
4.             }
5.  

It no longer produces an error. However, it never adds the force to the object, as far as I can tell. It's getting inside the if statement (tested with a print statement), so the lights are on, but nobody seems to be home.