[zetta04]

I am using the following code to shuffle MC's in a puzzle

Actionscript:

on (release) {
    for (var i = 1; i<16; i++) {
        with (this["p"+i]) {
            _x = Math.floor(Math.random()*400)+180;
            _y = Math.floor(Math.random()*400)+60;
            _rotation = Math.floor(Math.random()*2)*90;
        }
    }
}

It works fine except when you move pieces and then hit the shuffle button.
In testing the following error message pops up:

Error: A 'with' action failed because the specified object did not exist.

In play, all MC's shuffle except any that were dragged prior to hitting the shuffle button. Why would moving an MC a few pixels cause this? The MC hasn't been 'removed' from the main movie.