Hi AllThis has now happened on two flights in a row---I start out from EGLL going to KSFO--I make a flight plan in FSNav---export it to 2004 to RC to PMDG ---I open flight tracker---I open RC and load the plan--I also open the flight plan in the 747 fmc---the flight goes along normally and then out in the middle of the Atlantic the controllers start to vector me back on coures---I see myself dead on course as it relates to the FSNav plan and the fmc--what is the problem---I have not had this sort of problem in a long time using RCCheers and thanks for any help

if the waypoints are more than 100 miles apart, then my calculations start disagreeing with the great circle route calculations.luckily this has been fixed in the version i'm working on.no, i don't know when it will be released.in the meantime, put some waypoints between the farflung waypoints.jd

Thanks JDlike I said--I love this program