Having your connection to the network "dropped" while editing a transaction in a batch is the same (from the program's point of view) as hitting the power switch. It is certainly possible that this could corrupt the batch. We'll certainly be interested in helping track down the problem, but we will not be able to do much without a copy of your data. Hopefully you are making frequent backups - because the best information for us is a "before and after" snapshot with the data files getting damaged. Don't forget that the new version of Adagio all allow you to backup from the "File" menu. (Unfortunately, with your large historical database, this is going to take a bit of time). If you have a high speed connection, you'll be able to FTP the data to us (although sometimes recording it on a CD and sending it by FedEx is more convenient!).