Les:
1. Define "Overdue invoices." Are these all invoices issued before a certain date or only those unpaid after their due date?
2. GridView is the data extraction tool; GridView Server speeds up the process on large databases.
3. If you are looking for something to present to your client, by e-mail fax or mail, it may be that Crystal Reports is the better tool since it can do a lot more formatting of the output. (Here is a
sample of a similar report I did in Crystal Reports for a delivery/cartage company -- using Adagio Invoices rather than OE.)