Recently my 737ngx has started to CTD

after about 40 mins of flight time and it never use to do it. Any suggestions?

Has anything changed since before (new scenery or other add-ons, new hardware, etc.)? It would also be helpful to have some more information about the message you get during the CTD.

I've recently been getting a CTD with ATC.DLL being the faulting module. It always happens at some point in cruise, but never the exact same point, and always over the United States. I have flown NGX extensively around Europe with no problems. I have been trouble shooting for over a week and have ruled a lot of things out. I racked my brain trying to think of what was specific to that region and one of the things I came up with was the AI airlines. I disabled Ultimate Traffic II and so far I haven't had any CTDs since then. The CTD was very consistent over the southern US and more random over the northern and eastern US but never over the western US. At this point my best guess is it has to do with an airline that is concentrated in the region of the crashes. A corrupt texture or model or something. I did add on FedEx schedules and planes. I'm really not smart enough about this stuff to be sure about anything but like I said disabling UT2 seems to have stopped the CTDs.