HiAlthough PMDG software is fantastic i have one gripe, although using V. Route and top cat fuel prediction software i always get the message short of fuel from the oldest models to the new 737-800 any ideas, thanks in advanceDave

Are you accounting for the reserve?

I'm not sure about VRoute, but I know TOPCAT's fuel is only a suggested value.In the end though, you need to stop griping. The error is in the seat to yoke interface...Meaning, I hate to say it, but the problem is either you're not giving it enough fuel, or you're improperly configuring your reserve value. Either way, it's no one's fault other than your own (or who you get your data from).