Please explain then how I remove it when the entry is NOT there?
As I've said, several times, by removing the Scenery Area from FSX! There's no need to edit the scenery.cfg directly!
The scenery.cfg file doesn't reach 'area 135', either. There is nothing in the 'Addon Scenery' file. Help please?
You are not looking at the right scenery.cfg, the one that is used by FSX, that's why you shouldn't try to edit the scenery.cfg directly, because you might be confused which scenery.cfg you are editing. The one inside FSX is not the one used by FSX, it's just a backup containing only default sceneries, in case the real one gets corrupted.
The real scenery.cfg locations changes depending on the OS, user account type and Compatibility mode, and it's *usually* located under C:\ProgramData\Microsoft\FSX (which is an hidden folder, assuming you installed Windows on C: ), but you shouldn't be required to worry about it: just remove the area using the normal FSX user interface, in the Scenery Library page, and the message will go away.