Cutting up Image IllegalArgumentException for createWritableChild

So I'm hoping somebody will be able to help me out with this. I am writing a Jigsaw Puzzle game for my Computer Graphics class and I have run into a bit of a snag while trying to cut up my image into pieces. I believe the problem lies with the createWritableChild, but truthfully this error message isnt exactly clear so I am not certain. This is my error:

Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: Raster ByteInterleavedRaster: width = 45 height = 45 #numDataElements 3 dataOff[0] = 137 has minX or minY not equal to zero: 45 0 at java.awt.image.BufferedImage.(Unknown Source) at JigsawPuzzle.runPuzzleCreate(JigsawPuzzle.java:106) at JigsawPuzzle.gameBoardCreate(JigsawPuzzle.java:137) at JigsawPuzzle$3.paintComponent(JigsawPuzzle.java:65)

Here is my code that throws the error:

//Cuts up the given Image and creates the Puzzle and its Pieces.
public Puzzle runPuzzleCreate(BufferedImage p){
    int pieceCount = 150;
    int pieceSize = 45;
    Piece[] pieces = new Piece[pieceCount];
    Piece[] scaled = new Piece[pieceCount];
    Puzzle puzzle = new Puzzle(p, pieces, scaled);
    ColorModel cm = p.getColorModel();
    boolean premult = cm.isAlphaPremultiplied();
    WritableRaster raster = p.copyData(null);
    Posn pos = new Posn(0, 0);
    for(int i = 0; i < pieceCount; i++){
        if(pos.xPos <= 555){
            WritableRaster childRaster = 
                raster.createWritableChild(pos.xPos, pos.yPos,
                        pieceSize, pieceSize,
                        pos.xPos, pos.yPos,
                        null);
            BufferedImage pieceImage = new BufferedImage(cm, childRaster,
                    premult, null);
            Piece piece = new Piece(pieceImage, pos);
            pieces[i] = piece;
            scaled[i] = piece;
            pos.xPos += pieceSize;
        } else if (pos.yPos <= 450){
            pos.yPos += pieceSize;
            pos.xPos = 0;
        } else {
            break;
    开发者_StackOverflow社区    }
    }
    return puzzle;
}

It's a shame this exception is not documented, but looking at its message and the source code of BufferedImage, it seems you need to pass 0 for the 5th or sixth argument (or both) of the raster.createWritableChild() method call.