mbiggins

Thanks. 1, The open crossfeed valves may have been an inadvertent error on my part . I noticed when I closed them on the flight I am conducting now the error has resolved. 2. Yes on downloading en-route weather to FMC. 3. Fuel calculations have been calculated as mentioned and I have landed with plenty of reserve still showing a fuel warning . Oddly this has only just started happening over the last 4 flights. $. Yes I let the FMC calculate my step climbs.

Hi Running PMDG B777 with FSX and fly regularly with a good general knowledge of the sim/aircraft. For some reason I keep getting an "Insufficient Fuel" warning from the FMC. I have had this occur on short and long haul flights. I always carefully calculate loads and fuel and I fly with real weather software. This has never happened before! I have noticed that if I turn off the fuel tank cross-feed switches the warning resolves. This warning occurs prior to departure and continues regardless of my loads and fuel. This is a new occurance that I have never experienced before after many hours in this sim. Any ideas? Thanks Marc Biggins