Hey everyone, Earlier tonight I started a flight, while sitting in my aircraft, I started to get really tired, so I ended the flight as I usually would, then shut down FS9 and then my computer. One hour later I turned the system back on, started FS9, and it started rebuilding my scenerycfg files as though there was a change made to FS9! After I loaded FS9 I checked, and the season was still winter. I did nothing before this happened. I wonder if this is the precurser to CTD problems. I did have one CTD earlier in my ATR72, but have had that before with this AC. Any input? I can't seem to figure out what triggered this to happen??? I am keeping my fingers crossed that FS9 stays stable. It is always something with FS9. Thanks for your help.

check your fs9.cfg file for duplicate display entries. sometimes you also have misnumbered scenery layers in your scenery.cfg file. try flightsim manager, available here in the library I think. It is great at finding problems

Hey Alex, Thanks. At this point, with the problems that seem to appear out of nowhere, I am going to look into that for sure. I wish I knew why all of a sudden this happens? I did not touch any settings before this occured. I did want to ask though, if flightsim manager finds a problem, can I trust it to be correct, or can you get false alarms sometimes? Thanks again. I am heading over to the library first thing in the morning. Have a great night.

actually good point, thanks for reminding me. certain times you will get a false alarm. but the best error checking tool to use is the "check scenery config for misnumbered entries" or something to that nature. the landclass check gives false positives as Ive found out, but it seems like you might have mis numbered scenery config entries. or the fs9.cfg display problem which sometimes happens for bizzare reasons

Always defrag my system at least once a week. Then, run CCleaner (free program) before running FS9, it always finds trash in the system, cleans it out, and it has ended my CTD problems. From time to time when I forget to run it, it almost always crashed. Lots of invalid files in the Registry can cause FS9 to crash. Deleting even pictures, addons, other programs, et al, leaves lots of invalid registry entries. When FS9 loads it spends a certain time searching, if it does not locate files in that time, it aborts to desktop. Invalid entries in the registry look for the files each time you use, extending the time needed to load FS9...