Don’t know if this has been covered - I didn’t see it.  When cruising at altitudes above FL180, when I am passed off to a new controller they give me the altimeter setting. As I recall, in the US that information is only transmitted to aircraft below FL180 or cleared to descend below it. Above FL180 the altimeter is set to Standard so the info is of no use. Of course, outside the US transition altitude may be different, so I guess the call is country-specific.

That shouldn't be happening in the current version of P2A 2.6.4.1.

If it does happen with the latest version, please send the log file for the flight to [email protected] so I can troubleshoot it.  

P2A Log files are located in:

C:\Users\<UserName>\AppData\Roaming\P2A_200\Logs

where <UserName> is your PC user name. 

Portions of the path may be hidden by default, so be sure Windows Explorer has Show Hidden Items checked in the View tab.
A new one is created each time you start Pilot2ATC, and is closed when you shut it down. So if you take the most recent one after you have the error and after you shut down P2A, you should have the correct one.  

Dave