Hi,

I recently had some freezing during long flights using the PMDG 777F. from what i have read it could be FSXWX. the advice was to use FSXWX for initial take off and climb to cruising altitude, then when descending start it up again. so i tried it and when i reached FL360 i disconnected FSXWX and suddenly my TOT jumped from -21 to +55 degrees C. it also effected my altitude, it suddenly went from F360 to FL220, also the speed dropped to just above stalling speed. i tried to recover the climb back to FL360, but it could not climb as with the low speed i kept stalling. i tried to climb in small steps such as 1000ft at a time but with no luck. when i reconnected FSXWX it went back to the original FL360 and correct speed and TOT of -21Deg C. but then after 10 minutes FSX froze again. is there a workaround to this.

Regards

Steve 

Use a better weather program.

It could be the weather program but long flights in a 32-bit program like FSX usually results in running out of VAS.  Have you been monitoring your VAS usage as suggested by the AVSIM CTD Guide, page 15?  You need to rule that out.  On long flights, as you near the descent phase of your flight, there are more resources placed on your sim and probably enough to freeze up FSX.

we all know that since fsx is a 32bits flight sim is problem, maybe it time to upgrade to one of the 64bit flight sim,or wait for the fsx2020