AIR Error #2037: "Functions called in incorrect sequence, or earlier"

After a short quiet period I'm back today to tell you something about the AIR file object. While deploying a new version of my application I ran into some problems on other systems. AIR threw the error

#2037: "Functions called in incorrect sequence, or earlier"

Not really self-speaking, huh? Doing some debugging, I found out that the error was thrown at last line of the following code:
var zfile = new air.File(); zfile = zfile.resolvePath(path);
The problem is, that the File and the FileReference classes need to be initialized with a file path, otherwise every attempt to access a property will fail. Thanks to Mike Chambers who talked about this issue earlier. His blog post really helped me a lot. I fixed this issue by changing my code to the following:
var zfile = new air.File.applicationDirectory; zfile = zfile.resolvePath(path);

This initializes the File object with the path of the application directory, which should be fine for all cases.

What is also interesting about this topic: the error only occured on a Mac OS X system, not on my Windows machine. Have not yet been able to test this under Linux.

//Update: I still encountered some problems using this mechanism. For some reason zfile contains no valid resource on Mac OS X. Just FYI