sounds like you're trying to play the mod on an unmodded server which you SHOULDNT do because it is considered cheating, it can also crash the server

There is no objective truth other than schplurg,
Everything is relative to schplurg

That error is a readout of his own server files. We don't know what they mean - but one thing i have noticed is that if the server crashes (means your "disconnected" from your own server, then you usually don't get a readout..........it jsut crashes.........

What did you mod instead (that is probabily alot easier to figure out what is wrong by that, then guessing what the cryptic message is - which is near impossible. where were you (loadup?) - but mainly what did you mod?

I added 6 ships (Liberty Cruiser, Anteus, Hornet, Cougar, Starviper and the Vesuvius)
And a new system

2865734853
This number - your lucky .

Download the game data generator from here and then enter the name as specified for the program to work on YOUR mod. After that - set it running on the files, and then use a text editor to search for that number (using find command) and match it. You WILL be able to find it in A file somewhere - and when you do, that will sort the problem out.

I am guessing that the crash is in your new system? In that case its probabily an encounter that you never came across is all - and that is why it worked in Open SP.