Hi!My FS9 sometimes suddenly abruptly exits while I am flying;particularly when I follow AI aircraft using MRAI's AI-trafficmodule.Does anyone know if this has to do with AFCAD-files, module-files, or what?I suspect that crossing runway AFCAD's can mess up sometimes.I changed some to normal landings and takeoffs and then things were better.Grateful for any tips and help.Thanks!Hans HermanssonSweden

The AFCAD files are the likely culprit. A search of the forum should reveal many threads on this topic. Typically the way to troubleshoot is to remove all the files and add them back one-by-one until the problem occurs, then you know which file is the problem one.