My flight sim seems to have suddenly developed an error in the heading indicators. I am off by about +20 degrees in both the magnetic compass and gyro indicators. This error is appearing in all planes, settings and flights.For example: sitting on Runway 34R in Seattle in the default plane and flight start-up position my compass and directional gyro in the Cessna are reading 360.I know about the "D" key to adjust the heading, but that just adjusts the gyro to the magnetic compass. That doesn't fix my situation since both are reading off.Two questions. What the heck did I do the cause this problem? Two, how the heck do I fix it?Appreciate any help you can lend me.Dave Spurlock

You need to check another runway at an airport halfway around the world.KSEA had a -19.4 degree magnetic deviation in the real world when the FS data was compiled.Check YSSY - which has a +13 degree deviation.If both airports are showing the true heading and not the magnetic heading - then you have loaded a file which is causing the magnetic deviation world wide to not be calculated.I have never heard of this occuring in only one airport or area - but you need to be sure first.Uninstall your latest additions, one at a time until you find the culprit.There was an exclude file for an older version some scenery for an island near Australia. Don't remember which right now.The only time I've had the issue on my personal computer was caused by a texture to "improve" clouds.If you determine exactly which scenery, texture or whatever caused the problem - please let us know.

As soon as I read that a scenery file could do this, I had one of those "Ah ha!" moments. I went directly to the offending scenery file, disabled it and voila, problem solved.It was one of my own scenery files. LoL. Thanks for your help in resolving this.Dave Spurlock