Yes, I agree. I also get this error message: ''scenery cfg file error, invalid remote scenery path in scenery area 120.''
The message means you had some scenery installed, but later removed its folder without running its uninstaller. Assuming, of course, it *had* an uninstaller to begin with, and the uninstaller does what it should, that is removing the area for the scenery being uninstalled from the scenery.cfg as well.
However, this message, on its own, wouldn't cause any problems, just accept the removal of the orphaned areas, and FSX will remove it so the message shouldn't appear anymore on future restarts.
It's likely you have OTHER issues in your scenery.cfg, either because you hand-edit it or some 3rd party installer or utility has corrupted it ( that's why we don't even touch the file if it's not clean, so nobody can say our installer corrupted it, which what it would likely happen if we tried to modify a scenery.cfg with errors in it ).
And no, reinstalling FSX won't fix it, because the scenery.cfg is not recreated from scratch when reinstalling, unless you remove it manually.
If you could post ( ZIPPED!! ) the file, I can easily tell you what the errors are. It's located here:
C:\ProgramData\Microsoft\FSX\scenery.cfg
Please do not post it as a text, but ZIP it and Attach it to your reply, I need to be sure it won't be changed by the forum software when posted as text.