Adobe AIR app running fine on Adobe Flash CC but crashes when published

Hi,

I am developing an app for Adobe AIR. The app works fine when I compile it on Adobe Flash CC when I run it through the ADL. When I publish the app for Desktop and run it, I get the following error:

VerifyError: Error #1014: Class flash.filesystem::File could not be found.

This is strange, because it seems that actually, when I run the app outside Adobe Flash, the app is run through Flash Player.

Any ideas?

Thanks!