Steve -
I got a large number of error messages from Aurora as I was creating systems. I was trying to generate a system with certain characteristics that I needed, so I was generating system after system and deleting them if they didn't have what I needed.
I got two different types of errors. The first related to wrecks, for some reason. After hitting the system create button, Aurora would throw a series of errors relating to wrecks. I forget what the exact error message was, but I'm fairly sure I can recreate it if you need it. I wasn't aware that wrecks were generated at the same time systems are, but this one showed up often.
The second type of error related to the star type. IIRC, Aurora couldn't find information for a certain kind of star. I noticed that when this error appeared, there would be a blank line in the star portion of the system display, as if there was supposed to be a star, but no characteristics were generated. As I said before, I can probably recreate this one if you need the exact error message.
Both of these cropped up quite a bit, though, and I haven't done anything unusual in this campaign, so they should be easy to recreate by generating random systems.
Kurt