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POTypeError: Error #2007: Parameter hitTestObject must be non-null. Why
 

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  1. POTypeError: Error #2007: Parameter hitTestObject must be non-null. Why
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    <p>So im trying to make a bullet-ship hitTestObject ,but i don`t know why the variable representing the bullets.length doest change.</p> <p>so the error comes from this function </p> <pre><code>function doShips() { trace("bcount :" + bcount) trace("_bulletsArray length:" + _bulletsArray.length) for (var i:int = shipArray.length - 1; i &gt;= 0; i--) { shipArray[i].moveDown() //what the code in the Ship and Ship2 class does -&gt; only: this.y += 3 for (var bcount= _bulletsArray.length-1; bcount &gt;= 0; bcount--) { //if the bullet is touching the ship while (shipArray[i].hitTestObject(_bulletsArray[bcount])) { //if we get here it means there`s is a collision removeChild(_bulletsArray[bcount]); _bulletsArray.splice(bcount,1); removeChild(shipArray[i]); shipArray.splice(i,1); } } } </code></pre> <p>}</p> <p>before that i have also a shoot function that shoots bullets and puts them in the _bulletsArray.</p> <p>when the traces come it is showing : when i dont shoot bullets it gives me this</p> <pre><code>_bulletsArray length: 0 bcount: 0 </code></pre> <p>and when i shoot it gives me this :</p> <pre><code>bcount: 0 _bulletsArray length: 1 </code></pre> <p>or </p> <pre><code> bcount: 0 _bulletsArray length: 2 </code></pre> <p>so why doesnt the bcount change when The the _bulletsArray changes , when i am telling it to do so in the <code>for (var bcount= _bulletsArray.length-1; bcount &gt;= 0; bcount--) {</code> even worse - when i datatype the 'bcount to a number 'bcount:Number' it gives me NaN</p>
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