Hello, It is also a problem for me. Take a look at this discussion: http://forum.avsim.n...nding-a-flight/I want to add two things. First, it happens with B737NGX SP1 (and -6700 expansion) too and second, I have not had this problem before formatting the FSX dedicated drive and reinstalling FSX+PMDG 737NGX again.I think all windows OS updates are downloaded and installed (DirectX libraries, .NET framework files and so on). My nVidia driver version is the 266.xx (i don't remember well), but this evening I am gonna try to update them to another newer and see what happens.Thanks, bye.P.S.: I will try the option given by wildtrout1. About the PMDG team member's reply it is uncommentable for two reasons: first, It was not a known issue for me because I have never had that problem before FSX disinstallation, second, because if I want to do briefly test flights and everytime I need to close completely FSX it is a very waste of time!

It doesn't seem to have been. It still happens for me, but not always.Andy Lawton

I think I'd better retract that post and apologise to PMDG!Thinking back FSX only started crashing on selecting "End Flight" fairly recently and then earlier this evening I realised that the 'Add-ons' entry was missing from the FSX menu bar. A search suggested a problem with dll.xml and sure enough it opened misformatted in IE8. It turns out that there was a line right at the end of the file with only an 'H' in it. I deleted that and the 'Add-ons' entry is back and I can use 'End Flight' after flying the NGX without FSX crashing - so far anyway.Andy Lawton