Invalid BitmapData Error #2015

Question

I'm getting an Invalid BitmapData Error #2015 at
flash.display::BitmapData$iinit() that points to the line
of code below where a BitmapData object is created.
I am using this function to create only a few hundred
Item objects, each of which is only 166 px by 96 px in
size so I don't believe that the problem has to do with
running out of memory. I also used system.totalMemory
to trace memory consumption but it showed that only
a few tens of megabytes were used when the error occurred.
I have tried setting the BitmapData and Bitmap
objects to null because that was a solution I found on another
site. That didn't work. I tried dispose(). The error
occurs intermittently, sometimes after running my app a few
times and sometimes when I first load it. I am not
refreshing my browser over and over in order to run the app.
I cannot figure out the exact sequence of events that
leads to this error. In earlier versions of my app, I was able to
successfully use the exact same function (minus
the lines where the BitmapData and Bitmap objects are set to
null). I am not an expert at Actionscript, so perhaps
I'm doing something wrong. Please help me out. Thanks.
          public function cloneItem(item:Item):Item {
               var itemClone:Item = new Item(item.ID, item.name, item.bpCost, item.bcCost, item.quantity);
               var tempBitmap:Bitmap;
               var tempBitmapData:BitmapData;
               var tempSprite:Sprite;
               if (item.card != null) {
                    itemClone.card = new mcCard();
                    itemClone.card.txbCardName.text = item.card.txbCardName.text;
                    itemClone.card.setCost(item.card.cost);
                    itemClone.card.txbSet.text = item.card.txbSet.text;
                    itemClone.card.txbRarity.text = item.card.txbRarity.text;
                    itemClone.card.txbLevel.text = item.card.txbLevel.text;
                    itemClone.card.txbType.text = item.card.txbType.text;
                    if (itemClone.card.txbType.text.indexOf('Unit') == -1 && itemClone.card.txbType.text.indexOf('Hero') == -1 && itemClone.card.txbType.text.indexOf('Leader') == -1) {
                         itemClone.card.hideUnitAttributes();
                    } else {
                         itemClone.card.txbAttack.text = item.card.txbAttack.text;
                         itemClone.card.txbHP.text = item.card.txbHP.text;
                         if (itemClone.card.txbType.text.indexOf('Leader') == -1) {
                              itemClone.card.lblMP.visible = false;
                              itemClone.card.txbMP.visible = false;
                         } else {
                              itemClone.card.lblAttack.visible = false;
                              itemClone.card.txbAttack.visible = false;
                              itemClone.card.mcSword.visible = false;
                              itemClone.card.lblHP.x = itemClone.card.lblAttack.x;
                              itemClone.card.txbHP.x = itemClone.card.txbAttack.x;
                              itemClone.card.mcHeart.x = 0;
                              itemClone.card.txbMP.text = item.card.txbMP.text;
                    itemClone.card.txbRules.text = item.card.txbRules.text;
                    tempBitmapData = new BitmapData(166, 96);
                    tempBitmapData.draw(item.card.mcImage);
                    tempBitmap = new Bitmap(tempBitmapData);
                    //tempBitmap.cacheAsBitmap = false;
                    //tempBitmap.smoothing = true;
                    tempSprite = new Sprite();
                    tempSprite.addChild(tempBitmap);
                    itemClone.card.mcImage.addChild(tempSprite);
                    //tempBitmapData.dispose();
                    tempBitmapData = null;
                    tempBitmap = null;
                    itemClone.card.buttonMode = true;
                    itemClone.card.mouseChildren = false;
                    itemClone.card.tabEnabled = false;
               return itemClone;

Answer 1

More shots in the dark...
Check the following:
1) The height and width may be invalid.  Change it to:
new BitmapData (item.card.mcImage.width, item.card.mcImage.height);
2) If that doesn't work, try it with just a single pixel
new BitmapData(1,1);
3) Check to see if the movieClip has been resized or transformed.
4) Make sure the MovieClip is at 0,0 registration
5) Try setting the alpha value to false and see if it captures a black rectangle
new BitmapData(166,96,false);
If it doesn't throw an error, and returns a black rectangle, it means there were no pixels for it to capture.
6) Substitute the item.card.mcImage with a different MovieClip.
7) And lastly, try to comment out code that comes before to see if it's something else that's causing the error.  Sometimes the error is being thrown for entirely different reasons than it says, but AS gets confused.