As an aside, if you ever see a large unexplained error, trying pushing the a/c back and pulling it forward again. Worked for me a couple of times.
I'm just a newbie on the 400 (I'm off the 200) so don't flame me, but I was recently told that the WABC-calculated GW and CG values "freeze" at doors closed.
If by any chance the tailstand/nose strap was still attached when the last door was closed then the values would be inaccurate and possibly out of tolerance, but simply opening L2 and closing it again permits the WABC to have another go at estimating the weight. Anyone here know if this is true (there is shockingly little information about the WABC on our manuals)?
MD