I have, after installing the update, attempted to also update the navdata files, but still am receiving a "not in data base" msg. I have tried twice, with the download from PMDG and Navadata and still getting message. Any suggestions?

Have you downloaded the All-In-One sid/star file from http://www.navdata.at/php/sidstar/aio.php?addon=PMDG and extracted the contents of the file to PMDGSIDSTARS in your FS9 folder?

Sorry I thought I mentioned that I downloaded from both the PMDG and NAVADATA sites, like I have numerous times before but the 747 is still showing no data files.

Oh by the way my level D 767 has also lost it nav data files as did all the rest of my PMDG A/C.

http://www.precisionmanuals.com/images/forum/supporter.jpghttp://www.precisionmanuals.com/images/forum/747400.jpg"Always sit at the rear of an aircraft,because they always find the Black Boxes"Hi there,Are your Airac files upto date/latest version,or have you tried going back a month to the last file and reinstall that one,i have Level D's 767 and PMDG 737 and 747 and have had similar messages to you.Hope this helpsRegards Dave