Error:Version Check failed
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|An explanation of what happened: FG changed version number; specifically, we went from 3.7 to 2016.1.0. The version number is hardcoded in FlightGear as well as in FGData. Whenever the simulator is run, it checks whether those numbers match, so that you won't experience problems caused by incompatibilities between old FG versions/new FGData or vice versa.
In your case, you probably had an older nightly build installed/built (which had version 3.7 hardcoded in). By pulling yesterday's FGData, you pulled in the change in version number as well, so that FG will now - legitimately - refuse to start due to the mismatch. The latest nightly FG build on the build server should fix the problem.
|All that is needed is a fresh git pull of simgear, flightgear and fgdata, followed by cmake and compile and install of simgear , then cmake and compile and install flightgear to get everything back in sync.
|there's too many changes which are correlated across binary and FGData. For instance, the runway lighting being exposed has affected the binary, but the effect declarations needed reside in FGData. TorstenD's ATIS changes are across both. Typically, I can't even start FG when getting a new binary without also updating FGData - it just crashes.
So I don't think this would be desirable - and if you must, modifying the version file is easy enough.