addChild general question

[Ken Rogers]

If you instantiate a class but don't addChild, does the object even exist at all?

I've tried instantiating classes without addChild (because I don't need to see it right away as it is off-screen) I get the error:

TypeError: Error #2007: Parameter child must be non-null.

[nanook]

An object exists as soon as you create an instance of it. addChild just adds it to the display list. Object children that have been added to the display list get displayed on the stage.

You should post your code so that we can see where the error is coming from.