Hey Support. I have a problem that when using the NGX at a specific airport and other factors the FSX hangs. in the Forum that I am member of (VATIL), it appears that I am not alone with this and every one that tries it gets the same thing, FSX hangs. here are the details that makes this happens 1.Using the AIRAC1108 (part of NGX) 2.parked at LLBG - at whatever gate (FSAddon Scenery for LLBG) - could be maybe also with the default scenery, I haven't tried it with the default. 3.picking a RW in the FMC (still not a problem, no issues). 4. once I pick "PURLA1FS" SID and right after picking "SUVAS" Transition, the RW disappears from the FMC and I get an error in the FMC "RUNWAY UNAVAILABLE FOR SID" and a second later FSX hangs. I checked the AFCAD file and it seems the SID is written well/ok for the RW. it happens to few of us on the same situation.I believe it has to do with the AIRAC conflicting something that the NGX tries to do and causes the hang. This is almost certain repeatable steps that you, the DEVs can simulate and see the hang.Maybe that would nail the coffin on that issue once and for all. If needed for testing I can get the Developer's of the LLBG scenery consent giving you a copy for you to test it on.I had spoken to him on the phone few days ago, is more then happy to assist. Good Luck , Great work so far, I just love the Product.God Bless the NGX