Having installed recently the PMDG 747 I created a saved situation flight. This was a full airways flight on auto with VNAV engaged.All went well until past the TD point when the programme crashed to desktop.This was a recent aquisition so I imagine already incorporating the mini patch.Ok off to PMDG with my problem but for one strange thing!I thought the flight and situation was quite interesting so to complete loaded my trusty Level D 767 at the start of the saved situation changing the 747 for the Level D 767.I then programmed the 767 FMC with the SID enroute and destination STAR as per the 747 flight all went well until on descent on VNAV when crash to desktop.I have never had any problems with the Level D 767 so any ideas would be much appreciatedPeter

I have found that in general saving a flight with a complex plane like the 737NG, in my case, and then switching to another aircraft quite ofen results in some type of problem. Start with the Default cessna, switch to yor aircraft of choice , then start your flight and I bet it will work perfectly. Another thing I have done , if a saved flight presents a problem, is to just delete it and create a new one.