Will look next time to contrail effects. I changed this:
1. I checked the folders aircraft and plugins and saw, they all write protected. I removed this.
2. Activate XPUIPC
During the flight, I did not change the normal TA in FMC, it was 5000 ft. But normaly I would enter 14 000 ft in Japan.
Made two flights:
RJSN - RJSN with a climb to 10 000 ft and changing altimeter settings during climb and descent -> NO CTD
RJSN - RJTT with climb to FL250 and TA 5000 ft, changing altimeter settings during climb and descent -> NO CTD
(Made the same flight some days before and CTD with TA 14000, no XPUIPC and no changes to folders)
I do not know, which parameters are transfered by x-enviro first. Temperature and Wind influences the PFD and ND in the Cockpit. But this would happen every time during flight, every 5 minutes without action of an user and the user has no influence of the values shown and calculated.
Altimeter settings are done by the user. And my CTD before always occur during descent. If x-enviro first changes the QNH in x-plane, maybe the calculation of the correct altitude or the values of the altimeters could be the reason for CTD? Because some people flying in Germany and Europe never get this CTD. Because TA/TL common below 10 000 ft. But in Japan or USA it is higher. This would explain, why there is no crash report and no further weather loading from x-enviro.