Export for actionscript - Not in first frame

Just a simple question.
Don't need to know if it works or not I have tested it. What
I want is to understand. Here it is:
If I use the Export for actionscript and I unselect the
Export in first frame, the item that will be linked by the ID in
the library must appear on the timeline. Normally it must be on a
frame that has played. IE frame 3 the item is there so I can use it
from the frame 3 to the last frame. This is how it works for the
_root. If I'm in a clip, the code can be on the first frame with a
stop. That means that the Item is on the second frame and has not
displayed, but it is accessible by the code.
Why?
Why on the root the item must appear on the frame where the
code is or before the code, but if in a clip, the code can works
even the item reside on a later frame that will never display
because there is a stop on the first one?
Tanx for your help to understand!

I think that this is probably because of how flash streams
content. In order for flash to play frame 2 on the timeline, it
COMPLETELY loads all the code and assets for that frame (but not
frame 3) and then 'plays' that frame. Therefore on the main
timeline, code on frame 2 can't access exported clips from frame 3.
However, if your movie clip is (for example) on frame 4,
flash will stream/load everything (including your complete move
clip) when the play head reaches that frame, so all assets within
that frame are available because in order to even 'play' frame 4,
flash has had to load the entire movie clip contents.

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AddChild + "export in first frame" unchecked

Hi all,
i've got this problem that i can't figured out. i've tried
google and adobe website, but no luck. i guess the people here
could help me
this is about addchild and export in first frame. i wanna
call an object from my library. in its linkage option i:
1. name it "rectangle"
2. give a class name "Rect"
3. have a base class "flash.display.MovieClip"
4. check "export for Actionscript"
5. unchecked "import in first frame"
no problem this far.
but when i tried to call it in main timeline with this
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Rect.
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because you haven't done anything to export your class.
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I have some large movie clips that I don't want to load in
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because you haven't done anything to export your class.
if you're not going to let flash take care of exporting your
class in the first frame, you have to do something to export it
later. and you're not and flash won't do that automatically
becauese it doesn't know what you want to do.

Export for actionscript - Not in first frame

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