ActionScript 3.0 :: AddChild Results In Null Object Reference

Feb 12, 2012

We are supposed to build a game, and each of us is to make a level. So we did, but integrating them is giving me issues. Specifically, each of our levels are contained within a symbol. I personally have a ton of symbols that point to eachother already (main.as, menu with various elements, level one, boss level) but for whatever reason whenever I try and addChild my partner's level it gives me "TypeError: Error #1009: Cannot access a property or method of a null object reference."

the way I've been doing it looks like:
 
var levelTwo:SkiHill = new SkiHill();
parent.addChild (levelTwo);
parent.removeChild(this);

like I said, it's worked every time Ive used it between my own things. My partner's is a no-go. If I just slap his level on the stage and go it runs fine, and it will properly add/remove child to transition to one of my levels.

All I can think of is that I've checked all the names. I also noticed my partner didn't use an ADDED_TO_STAGE event listener, but adding that didn't help at all.

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