After months of smooth operation I now get an error message when I load FS saying "can't find airport data file". I click OK and FS goes on and loads fine. Can anyone shed some light for me as to what this file is and where it should be? I'm thinking I could get it off the CDs, but I'm in the dark about the file. Any help will be GREATLY appreciated.Lee

Perchance, have you removed a scenery folder without disabling it within the Library first?

After digging through every addon for FS that I own, it turns out that it is a file related to the Jeppesen CD I purchased with all the world charts on it. I didn't realize it installs itself in FS9 so that you can view charts while in flight. A re-installation of the program cures the problem. Just thought I'd pass it along.Lee