from the for what it's worth dept...if your test is finished and you're in the middle of a retry in x seconds and decide to take a break for maintenance and do a stop-save-exit...when you start up again, it will be re-processing the better part of the last block...some of the new people may not realize that and think it's broke or sumthin'...some think that making a copy of the z-file before starting back up again is a good idea...