It's 1pm, and apparently I don't know where my children are.

Question

I'm getting lost trying to figure this parent/child stuff out, mostly in regard to trying to use "removeChild".
Here's the nutshell of what I'm doing:
In my public class I'm declaring:
var skillPointDisplay:mcSkillPointWindow = new mcSkillPointWindow;
In a function I'm using:
addChild(skillPointDisplay);
In another function I'm trying:
removeChild(skillPointDisplay);
Which tosses me this:
The supplied DisplayObject must be a child of the caller.
I'm stumped trying to figure this out.  If anyone can explain this to me or even just point me towards some good reading material that covers this I'd be very grateful!  I've done a bunch of Googling and tried different variations of this. stage. parent. stuff and just come away more lost. I'm afraid social services might get called in as I'm about to start beating this child.

Answer 1

are those two functions (the one with addChild and the one with removeChild), in the same class?
Yes, they are. Same class, different functions.
and you can always use:
skillPointDisplay.parent.removeChild(skillPointDisplay);   // but if you don't know what you're doing, that may cause other problems.
That was actually something I had tried in my googling attempts. When I try that I get this error:
TypeError: Error #1009: Cannot access a property or method of a null object reference.