Problem creating native extension package

In an effort to learn how to create a native extension on my own, I've looked to the examples and help documentation from Adobe. I have actually created the required files for the extension (the native code, extension descriptor, the swc library and library.swf). However, when I run the command to build the .ane file I get this error:
/Users/dalston/TeamAGC/sdk/4.6.0/bin/adt -package -target ane ../release/DeviceInfoExtension.ane extension.xml -swc DeviceInfoExtension.swc -platform iPhone-ARM library.swf libDeviceInfo.a
output file is not writable
I also tried a variation of that command that results in the same error (which comes straight from the Adobe help docs):
/Users/dalston/TeamAGC/sdk/4.6.0/bin/adt -package -target ane ../release/DeviceInfoExtension.ane extension.xml -swc DeviceInfoExtension.swc -platform iPhone-ARM -C platform/ios . -platform default -C platform/default library.swf
output file is not writable
I'm not sure what I'm doing wrong here. Has anyone had this problem before? Thanks in advance for your help!

Hello Colin,
The folder I was working from /Users/dalston/TeamAGC/sdk/4.6.0, which is where the AIR sdk resides. The actual directory with the native extension files are in /Users/dalston/Documents/Adobe Flash Builder 4.6/DeviceInfoExtension/bin/DeviceInfoExtension. When I run the ls command I see all the folders under the main user (dalston, which is me). I believe I have read/write access to everything since I am the adminsitrator on this machine. I am on a Mac by the way.

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This question was posted in response to the following article: http://help.adobe.com/en_US/air/extensions/WSf268776665d7970d-2482335412ffea65006-8000.htm l

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A year later, but I'm facing the same bug.
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Hey,
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http://pastebin.com/SFsq578R
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http://blogs.adobe.com/rajorshi/2011/11/18/debugging-native-extensions-for-air-ios/
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0 objc_msgSend
1 CFStringGetLength
2 _CFStringIsLegalURLString
3 -[NSURL(NSURL) initWithString:relativeToURL:]
4 -[NSURL(NSURL) URLWithString:relativeToURL:]
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7 avmplus::ExtensionContextObject::_call(avmplus::String*,avmplus::ArrayObject*)
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The best (in my opinion) is to write native code for mobile and desktop (no air or flascc involve) and use flascc for the flash/web platform. It's harder, because you have write portable native code (lots of abstraction), but you mostly have the same problem with native extension.

Adobe Flash Pro CS6 removes the native extensions section of my app descriptor

In CS5.5 I had some problems with native extensions, but that's ok, since CS5.5 was not ANE-aware (it was released before that).
But in CS6, it's even worse. It just deletes the whole <extensions>...</extensions> from my "xxx-app.xml" descriptor file each time I publish my SWF. Why?
It shouldn't do that! CS6 supposedly works with ANEs (it even has a special ANE icon in the "ActionScript settings" window, whereas CS5.5 didn't), so why is it removing my extensions from the descriptor?

To the right under "Target: AIR for Android" or "Target:AIR for iOS", click the wrench and go to the "permissions" tab. Check "Manually manage permissions and manifest additions".
I know that helped when it was messing with my intent filters and other stuff I entered (Stuff inside the CDATA/manifestadditions).
Not sure if it helps with the <extensions> tag, but its not deleting mine...
You could also try putting <extensions> directly after </android>, thats where mine is. I suspect some entries have to be in a specific order.

Problem creating native extension package

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