I have a hand help application that is using merge rep from SQL 2K CE to my SQL 2000 Server with a dynamic filter. I can connect to the database and download my copy of the data and everything works fine, however, the first time I sync after the initial download I get "ambiguous column name rowguid" I have deleted the publication and have started over and I get the same error. I have tried with two different hand helds and I get the same error. I have service pack 3a on my SQL server and the patch for SQL CE to support the 3a service pack installed on the server. I have no updates installed on the hand held and I am not aware of one being available. Any ideas?