Error using loadgraphic - Error #2015: Invalid BitmapData.

[Travis Stewart]

I was working on a game with an inventory system, which I created as a singleton and planned to add to any state that required it. Just before loading the first scene in the game, I call a method called setupInventory, which is supposed to initialize a sprite for the background of the inventory, and a group for the items that are placed in it.

I call the method just before creating the PlayState, as shown here:

class Game extends FlxGame
{
  public static var instance:Game;
	
     public function new() {
             .......
     }
		
     override public function update():Void {
     	super.update();
     }
	
     public static function startGame():Void {
     	Inventory.instance.setupInventory();
 	changeScene(new PlayState());
     }
	
     public static function changeScene(scene:FlxState):Void {
	FlxG.switchState(scene);
     }	
}

and setupInventory currently simply does this:

    public function setupInventory():Void {
      backgroundImage = new FlxSprite(700, 64);
      backgroundImage.loadGraphic(AssetPaths.hammer__png);
}

but when I build and run this in flash, I get an error:

ArgumentError: Error #2015: Invalid BitmapData.
	at flash.display::BitmapData/copyPixels()
	at flixel.graphics.frames::FlxFrame/paint()
	at flixel::FlxSprite/updateFramePixels()
	at flixel::FlxSprite/calcFrame()
	at flixel::FlxSprite/draw()
	at flixel.group::FlxTypedGroup/draw()
	at flixel.group::FlxTypedGroup/draw()
	at flixel::FlxState/draw()
	at flixel::FlxGame/draw()
	at flixel::FlxGame/onEnterFrame()

and I really do not know what this means, or why I would get it. I use the same asset at another point and it does not seem to have any errors. When I test using neko I do not get an error (though I am having some problems getting everything to draw, but I think that is a post for another day).

[DleanJeans]

I would not recommend writing a new class extending FlxGame but instead use signals in FlxG.signals like this:

Probably somewhere in your Main.hx:

// setup inventory before creating first state
FlxG.signals.preStateCreate.addOnce(Inventory.instance.setupInventory);

// setup inventory after creating first state
FlxG.signals.gameStarted.add(Inventory.instance.setupInventory);

[Travis Stewart]

I set things up differently so that I am no longer extending FlxGame, but I am still getting the same error.

[DleanJeans]

How different is the setup exactly?
Maybe create a test project which only has the Inventory and load the background before first state is created just like what you're doing right now.

[Gama11]

Flixel's graphics cache is cleared before state switches, so the BitmapData of the sprite may already be disposed when you enter PlayState (since you created the sprite beforehand).

[DleanJeans]

If what @Gama11 said is right, then try:

sprite.graphic.persist = true;