Maximum nested display containers?

Hi,
This question is as much about best practice in building
flash apps as it is about a specific problem I'm having. Is there a
limit on the number of layers of display object containers that can
be nested? I'm trying to build a web site, and currently, it's
structured as follows: A preloader loads the main swf. The main swf
displays a menu, and loads a different swf for each menu choice.
One of the menu choice swf's in turn loads a swf. So, there is a
maximum of 4 levels of nested display object containers in my app.
My problem is that display objects in the fourth level are
not accessible from the third level. When I try to reference the
fourth level .content from the third level, I get mixed results.
For example, I'm able to listen for timeline-related events, like
ENTER_FRAME, and to use methods like gotoAndPlay, but any reference
to a display object in the fourth-level container results in a null
object reference error. I tried running a function that recursively
lists display objects by container, and it lists everything fine
until it gets to the fourth level, at which time a null object
reference error is issued. The display objects that I'm trying to
reference are present in every frame of the 4th-level swf.
Is there a better way to structure a flash app than loading
multiple layers of swf's? Is there a recommended maximum of or
actual limitation on the number of sub-containers in an app?
--Dave

I was able to clean things up. The parent didn't like it if
the display objects were not present in the first frame of the
child, even if they weren't referenced until the child entered the
frame in which they were present. So, I put all of the display
objects in the first frame of the child. Then, instead of creating
motion tweens on the timeline of the child, in which multiple
elements were tweened separately, I tweened the whole loader object
from the parent script. And the second problem was not that the new
loader instance was failing with no error message; the problem was
that I had nested functions, and the call to the nested function
that creates the new instance was never firing. Thank you for your
help!
And BTW, my web site is only about 1/4 finished. I'm going to
purchase the software.

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