I've posted this question on the feelthere forum but unfortunatly don't seem to be getting anywhere. The problem I'm having is that when both aircraft are loaded I'm getting a regular stuttering every couple of seconds. I've tried every combination of settings for both the aircraft and FS. I think that I've narrowed down the problem, (using filemon and procexp), to both panels and even more to the access of the nd.mdl file that is loaded every 1 to 2 seconds. I have no anti-virus running and use FSautostart to close down any programmes running in the background. I've tried defrags and virus scan but still the problem persists. Can anyone help in finding a solution to this problem.Many thanks, Jez.P.S. I hope that I've posted this in the correct place.

Sometimes it`s quite impossible (and inpractical) to trace such problems back to find the root cause.If you don't have a PC dedicated to FS only like me (that is, absolutely only the software needed for FS and maybe reading files such as the Word/Excel viewers, but nothing else), there are chances you'd see unpredictible phenomenons like stutters, crashes etc.Windows is loaded with bugs, and the more you use your PC for things other than only simming (i.e. the more software you have installed), and the longer the time that's passed since the last fresh Windows setup, the more of such phenomenons you're going to encounter.In some cases, such symptoms occur immediately, though.To get rid of such things, only a Windows setup from scratch (including a hard drive partitioning) is the way I recommend.Pull out all hardware unnecessary hardware devices (built-in modem cards, SCSI adapters,...) and install Windows and the hotfixes from Microsoft. Use the absolutely latest and newest drivers for all of your hardware devices (chipset, AGP, USB, firewire, graphics adapter, networking adapter,...) and then disconnect the PC from any network by either disabling the network adapter or "pulling the plug".Then install only the two planes and see what happens.This is a problem that you need to try to resolve step by step: create a clean basis system, then gradually add soft- and hardware.Andreas

"nd.mdl" is a bit of a strange name but I'll bet it is the navigation display gauge. It would be normal to write to this gauge frequently but I wonder if they reload it to initialize it before writing the updates to it. If it is loading from disk (due to insufficient ram) each time I would think it would be in your disk cache. What does your physical ram usage show in task manager performance and how about page faults? If you have a lot during flight a ram upgrade is in order I would think.I had this happen with some aircraft but when through rebuilding a couple of PCs going to 1.25 Gb ram on one this periodic "scheduled" access stopped. It was not with the models you describe but others using complex panels.

Suppose that was a typo and the file in question is named "nd.mdb", a database for Windows' internal Jet database mechanism.It's the navdata database for FeelThere planes, so frequent accesses to it are quite normal I guess.Did you already try to download the latest from FeelThere's site?Andreas