If there were "integrity errors" detected in OE and you did a rebuild it is possible, depending on the level of damage to the data files, that SOME or ALL your orders/invoices could disappear. Adagio's rebuild should be used with extreme caution. The error report should be examined carefully and the rebuild requested once the cause of the errors are understood. Repeated errors are an indications of instability in the installation and should be resolved with the help of your Adagio consultant as quickly as possible.