Hi all, I have confirmed this is an AIR SDK 13.0.0.83 bug.
I have reported this bug to Adobe Bugbase, and I also included the workaround: https://bugbase.adobe.com/index.cfm?event=bug&id=3750892 The workaround is: Simply comment the <externalSwfs> tag will solve this bug, like this: DarkStone 2014-04-28 -- View this message in context: http://apache-flex-development.2333347.n4.nabble.com/A-fatal-ADT-package-error-possibly-caused-by-Flex-4-12-with-AIR-13-SDK-tp37236p37300.html Sent from the Apache Flex Development mailing list archive at Nabble.com.