[ColdSteel]

My guess as a programmer is that there might be an upper limit of 255 ships per battle (possibly per player) and this is what's causing the range check error. Sounds like a subscript blew somewhere. Since there's a 255 system limit it seems likely they are using this number as a limit elsewhere in the game as well. After all, 255 is a magic number for programmers.

I remember that MOO2 had a crash problem with very large fleets as well. Ruined the game for me.

You need to send MM the save files and a good description of the problem. This can really mess up a nice, big game and I hope they fix it in the next patch.