Quote (Bond009)
hey yan what operating system do you use? vista or win7? if so is it a 64bit os?
It's not an OS problem, I have also ran into this error myself 2x first time I lost over 100 older stats codes 2nd time I lost exactly 20 newer codes, however I am almost 100% certain that I found and fixed the cause in v.1.8+ and it wont ever happen again, but just in case I was wrong and something else was causing it I have the backup save, the backup save is also nice in case any other sort of error comes up.
Everyone just needs to keep up to date, 1.8+ is really the only 100% stable version all the others have a very small chance of losing all of your codes.