We have an Access 2010 database that is accessed by some users from another location. Each user has their own copy of the front end. For some reason two users in our Sydney office enter orders, but after they have entered and saved the order, sometimes for no apparent reason they get an "invalid argument" error message and all the data in the order has been converted to hieroglyphics. I cannot seem replicate this from my server location. Can anyone give me some advice on how to determine what might cause this? It seems to only occur from our Sydney based server. Could it be that each user's copy of the front end is located on the same virtual drive on our Melbourne based server? Should I move the Sydney user's copies of the front end to the Sydney based server? I am not sure what to do?