:-)I have downloaded from www.navdata the file PMDG AIO andunzipped to PMDG sidstars.When I load the fligtplan EHAM-EGLL I get the message:EGLL : Err Donut unknown. In the database the sidstars of EGLL are present,but not availablein the flightplan. I have this error i several flightplans.Who van help me out ?.

It sounds like the AIRAC database of the PMDG is out of date. The files you have installed use waypoints that are not in the PMDG FMC database. What you can do is update your FMC AIRAC database from www.navigraph.com, though the upgrade will cost you 20 credits. Credits can be purchased directly from navigraph or via simmarket (or similar outlet). The good thing is, once purchased, you can download the AIRAC data for all of the addons listed on Navigraph that use these data at no extra cost.I purchased 100 credits initially, which is good for 5 AIRAC cycles...Check out www.navigraph.com for further details...By the way, FYI, I am not affiliated to Richard Stefan, Navdata or Navigraph...Andrew