Looking to discover the cause of my FS woes I have come up with that old chestnut - the location of Landclass files.As I understood it, LC files should be in a separate Scenery folder with no accompanying Texture folder.I have been using a tool called FlightSimManager by Rana Hossein to look for rogue files and stuff, and it shows a number of files it considers to be Landclass even though they might have different names, like "Photo" or "Low" or "Ground" for example - but all ending .bgl.I know that in a number of my payware sceneries, files that FSManager considers Landclass are bundled in together with other scenery .bgls. Which presupposes that - - If this were incorrect, payware developers wouldnt do it, and - If this were the cause of my issues, all other customers of this scenery would have the same trouble as me.Interestingly, FlightSimManager didnt "find" any of the files that I installed as being Landclass, such as some of Toni Agramonts LC.And just in case anybody missed my other posts: I get CTDs with a message "Cache Directory Error" telling me that files are missing: might be bgl, or .dll or whatever - but when I check they are present in their correct location.Run Tune HD Pro - all green and ok.This has been going on for months., Dont know what to do.

I kind of doubt landclass is the source of your problem, but as a general rule I would say those landclass Id programs like FSM are just a starting point and can't be followed blindly.Just to review "landclass" is a type of BGL file which is used in a control file, lclookup.bgl to select terrain texture tiles to render. In general, there are two variations of interest here:1. Landclass BGL which supplies it's own required texture bitmaps. This would include so-called photo scenery or custom terrain scenery. The required btimaps reside in the "paired" texture folder.2. Landclass BGL which uses the default texture bitmaps. The required bitmaps reside in the scenery\world\texture folder.It is the later type of Landclass BGL which can give rise to exhaustion of application memory space when a paired texture folder exists, at least that's my understanding.scott s..

Thank for this this input.I had been wondering if there was something in one/some of my scenery files that was looking elsewhere for something else to "complete" it - hence the CTD and "missing files". So apparently not.Spoke to two FS software developers - neither has ever heard of this problem. Three FS forums - ditto.Heres an idea: I have reduced my scenery to South America - previously S.Am, Europe and the US. Since then flights have been 2.5 and 3.5 hours long before crashing: before that, with all the scenery in I could get about 90 minutes before crashing.So seeing as there are fewer scenery files it will take more time for the error to appear - right? Which would also explain why there are now more FS files being reported as missing whereas before it was mostly addon-scenery files.Looking more and more like a hardware fault you reckon?

The more sceneries I remove from FS the longer it takes to crash which makes me think that the HD has faults - they just take longer to find.So .............Uninstalled FS9 from there, first uninstalling the 9.1 update via "Add/Remove" and the few aircraft and sceneries I had working.Installed clean FS9 on my C drive. Ran update: "It appears that the update is already installed". Well, this is silly, cos I ran Disc Cleanup and TempFileCleaner and CCleaner about a million times with reboots, and FS was never installed on that drive.Is this a Registry thing? If so, would someone please tell me where to look and how to fix it. But I need real hand-holding cos I

Looking to discover the cause of my FS woes I have come up with that old chestnut - the location of Landclass files.As I understood it, LC files should be in a separate Scenery folder with no accompanying Texture folder.I have been using a tool called FlightSimManager by Rana Hossein to look for rogue files and stuff, and it shows a number of files it considers to be Landclass even though they might have different names, like "Photo" or "Low" or "Ground" for example - but all ending .bgl.I know that in a number of my payware sceneries, files that FSManager considers Landclass are bundled in together with other scenery .bgls. Which presupposes that - - If this were incorrect, payware developers wouldnt do it, and - If this were the cause of my issues, all other customers of this scenery would have the same trouble as me.Interestingly, FlightSimManager didnt "find" any of the files that I installed as being Landclass, such as some of Toni Agramonts LC.And just in case anybody missed my other posts: I get CTDs with a message "Cache Directory Error" telling me that files are missing: might be bgl, or .dll or whatever - but when I check they are present in their correct location.Run Tune HD Pro - all green and ok.This has been going on for months., Dont know what to do.

You probably know this already but if you have done a complete installation of FS to the hard disk you don't need caching enabled at all. Disable it for all sceneries and see what happens. Landclass is probably not your problem.If you have a fairly recent copy of FS9, right click the executable and check the version number and make sure it isn't already 9.1. Also note that when you do an uninstall not all directories get removed automatically and you should go in and manually delete all remains before reinstalling.DJ

Thanks for your input - sorry I didnt reply sooner.New FS9.1 install on a different HD in my system.Wow, but what a visual difference! Even with the same FS9.cfg as before I am getting more blurries, more tearing, more stuttering: the only thing I can think of is because its on a much much fuller HD than before - where it was all alone in a 250Gb pool.One 90 minute EGKK-LPPT flight completed with no problem. No "missing files".On vectors after a more than three hour LPPT-EPWA - CPU monitor shows usage drop to 2% % 3% - things pause - things recover and the CPU goes back to its usual 54-60% - and - well, you guessed it - blackscreen with the now famous "Cache Directory Error" claiming that an .agn file is missing.A dxdiag.exe messag saying that it cant start, and the only way out is a forced exit.I am completely ******* now: I just dont know what to do.

So .............Uninstalled FS9 from there, first uninstalling the 9.1 update via "Add/Remove" and the few aircraft and sceneries I had working.Installed clean FS9 on my C drive. Ran update: "It appears that the update is already installed". ThanksNicholas

Part of the problem stems from the fact that using the uninstall routine only is not enough. It leaves a number of files and folders behind which must be manually deleted prior to attempting a clean re-install. If you do not do that, the "update" will apear to have already been installed. Also, if you were having issues whose cause was rooted in any of the files which did not get removed, the problem would still exist. This "Guide" covers the subject in some detail and it may be helpful.http://library.avsim.net/esearch.php?CatID...amp;DLID=123907Good Luck!

Would your comment about the uninstall being "incomplete" and leaving detrius still apply to my new install of FS on a completely different HD?I have run TempFileCleaner and CCleaner I dont know how many times - but thats about as far as my knowledge of house-keeping goes.I have a new FS9. definately updated, on a different HD and STILL get the Cache Directory Error.Thanks for the link.

Oh, that guide to unistalling and installing :( Good read - should be stickied up there at the top of stuff.