OK, problem solved! It was the X-aviation credentials. When it asked me to authorise the PC, I ignored it, since the same pc was already on the list of authorised devices. Presumably it didn't recognise it since I did a full Windows reinstall last week. Once I authorised it again, all is well now.
Thanks for your help!
For a weight of 42.000 kg (92.400 lbs) the official performance climb charts (for ISA +10) show:
To climb to 37.000 feet:
Time: 15 mins
Fuel: 1150 kgs
Distance: 92 NM
This is with the normal climb profile of 250/290/.74
Cheers, Jan
I'm not here to debate you. I'm just informing you.
The policies are made clear. Actions can have consequences. I've done my part to explain those consequences to you.
At the end of the day you make your own decisions.