I have a database that is split into the front end and the backend. I have 8 different users for the front end. Anytime I make updates to the front end I push it onto the users desktops. All of my users are reporting no problems except for one. They are getting the error; "Microsoft Access can't run the Macro or callback function 'Close Sample Registration Preview'. Make sure the Macro or function exists and takes the correct parameters." I can look at the database window and see that the macro exist. So why can't I run it? No other computers give me this problem, the same frontend is pushed to all computers.