Loading an external MC with Tween

I am getting this error when I load an external movie (which has Tween Animations):
TypeError: Error #1009: Cannot access a property or method of a null object reference.
    at MethodInfo-46()
    at flash.events::EventDispatcher/dispatchEventFunction()
    at flash.events::EventDispatcher/dispatchEvent()
    at fl.transitions::Tween/set time()
    at fl.transitions::Tween/nextFrame()
    at fl.transitions::Tween/onEnterFrame()
The MC loads but once I unload the main movie locks and does not allow interaction.
Any ideas why?
Thank you

Hello Kglad:
I followed
I still get this:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
    at MethodInfo-46()
    at flash.events::EventDispatcher/dispatchEventFunction()
    at flash.events::EventDispatcher/dispatchEvent()
    at fl.transitions::Tween/set time()
    at fl.transitions::Tween/nextFrame()
    at fl.transitions::Tween/onEnterFrame()

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What is or isn't possible on iOS? (Not having Loader, loadBytes(), external swfs, etc)

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I have been trying for a few days trying to get a simple Flash app to run on the iPad. A very simple app (with sound!) with just 2 classes works fine (Performance is a whole other issue. We will get to that). But if I try anything else, all I get is a white/black screen on the iPad. So it would be really nice to know what classes, functions, etc we CANNOT use for the Packager.
I have fairly simple app (not as simple as 2 classes) which loads some art assets via URLRequest/Loader, puts them on the stage. Fairly common standard practice in AS3.
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The best way to load an external swf file for iOS seems to be using [embed] with "application/octet-stream" and load the swf through ByteArray (Option #4 in the link above). This works great on the PC. HOWEVER, on iPad, it fails. The [embed] tag works on the iPad with the other ways, so my guess is that loadBytes() does not work. Is this true Adobe/Flash guys? Can you confirm this?
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I have hardly ever seen a post here from someone at Adobe, so you may need to be patient.
Read this article, and get its associated demo files, to see some good performing tech demos:
http://www.adobe.com/devnet/flash/articles/optimize_content_ios.html
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var ldr:Loader = new Loader();
ldr.contentLoaderInfo.addEventListener(Event.COMPLETE,loaded);
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innermc.x = 50;
innermc.y = 50;
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How do I format an external HD with Recovery Disk Assistant on?

Hi,
I have seen a couple of threads on this, but I'm still not "Compos Mentis" with how to format an external drive with the Recovery Disk Assistant on.
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Anyway in short, I need this
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I don't understand what you mean by, "how to format an external drive with the Recovery Disk Assistant on."
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