Dont know if this is the right place to post but I will give it a try. I have PMDG 737 600-700NG 800-900. What happens is when I want to make a turnaround flight for a second leg as soon as I open the Com. panel and press the frequency change knob I get a CTD every time.I run the following when I fly.ASV6Fs2crewFSpassengersI have checked all of those forums and I cant seem to find anyone else with the same prob. Any ideas ?

I've experienced random CTD when trying to change comm freq ever since the update to FS9.1 but this occurs for any aircraft default or PMDG. Might not be the same problem. Never found the cause.