The problem is that there are so many things that could cause the crash. Did you create the system by hand or using FLE?
First step i would do after backing up is to remove all of the patrols and see if it works. If not remove any nebulas/asteroid fields. Then any population zones.
If once uou've gone through the rest its either a ship/solar loadout problem or the encounter statements at the top have problems. If you have a entry that isn't in the folder then that ones a CTD too.