Hi everyone
Since the last update the atc call and say you are too high or too low on ifr flightlevel , this is because your QNH just switch on a standard QNH 29.92 without atc advertising.
Do you have a tips for that or the reason of this issue?
Press B from time to time to set the current barometric pressure.
I forget the magic switch, thank you for your help
Sry,
but I see simply bad habbit with that B key, simply you pick up QNH/altimeter settings on airport and you need have it set as is required, also no change during flight time to time. This can be problem if press change during pass of areas you fly, I expect ATC hold itself that press set as reference and you simply can’t have same if you change it during flight. Ok, I just only report my thoughts and also don’t fly generic ATC because of absolutelly no realistic.
Also remember, above 18000, always 29.92 (101.3)
Below that local pressure as advised by ATC or by pressing (as you know) the B button.
This is not correct IRL, as the 18000 varies in different areas, but the sim doesn’t differentiate.
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Sorry if this is a silly question but on metar readings the QNH is four numbers such as 1031 and is there a conversion to what you input in the plane such as 29.92? I’m sure I’m missing something obvious but had to ask 
No, there is a knob on the panel to change from one to the other.
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The QNH of 1031 you quote is in hectopascals which is the standard used throughout Europe and indeed most of the rest of the world except USA which uses inches - 29.92 your figure.
Unfortunately, being a US-based game, the sim doesn’t handle Hp very well - it can be changed but is then associated with other unit changes which spoil it, well for me anyway.
I downloaded and printed out a conversion chart which I keep handy (Google is your friend).
Incidentally the 18000 ft “transition level”, where you change the regional QNH to the standard setting, is not universal. AFAIK it applies outside controlled airspace in USA but here in UK it’s generally 10,000ft/FL100 everywhere unless otherwise advised. Not sure of elsewhere.
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Moved from Bug Reports as solution is indicated.
Transition Level in UK varies by Airport, you need to check charts. 10000ft is basically where Landing Lughts and Seat Belts get switched off
I don’t understand how this is a solution? It does not differentiate between Inches of Mercury used in USA and HPa used throughout most of the rest of the World.
Transition Levels in Europe vary between each airport, some maybe as low as 4000ft.
The poster was wondering why ATC was asking them to climb or descend when they thought they were at the correct altitude.
They did not ask about kPa, Inches of Hg, or if it is correct.
The response indicated as a solution explains why this happens.
There are wishlist requests on the issues you speak of, you may want to contribute to them.
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Thanks. I am fully aware of the posts regarding Unit settings and the fact that it is supposed to show millibars, but, does not. I have contributed yo some of those for at least two years but nothing has been done.
Your answer is not really a solution it is a Fudge (press button B).
I don’t use a keyboard and follow charts, luckily I am able to fly with VATSIM which uses the correct system.