OK folks, as stated in the title I get this anytime I am descending from high altitudes. The aircraft flown doesn't matter. As long as I fly low altitude routes (under FL180) I have no problems at all. Fly above that and as soon as the clearance is issued and I respond...CTD in terrain.dllI have uninstalled and reinstalled FS UTerrain and gone through all the monkey hoops I can think of. Upon reinstall, I can fly about 9 flights then this crappage starts up again...I cannot run FSX on this machine, so please no "switch to FSX" posts please. Any ideas???

Gee thanks for all the help everyone... :(

Well, you seem to have figured it out yourself in the OP. Since you can fly ok without UT, that basically means the problem is there. Probably a conflict with a mesh, since bad textures usually end up in fe.dll crashes. Do you have any mesh files installed? Is this a recent problem? Have you changed anything in your setup prior to these crashes? You're not giving us a lot to go on in at least trying to narrow it down :)Last but not least...google it, it's a very common problem caused by a myriad of reasons, any one of them could be your gremlin.