When you create a custom command bar that uses commands in the Built-In Menus category on the Commands tab of the Customize dialog box, Microsoft Access creates a pointer reference to the original built-in menu. Therefore, any modification you make to the Customs Command bar actually modifies the built-in menu bar. The solution is to split the database. Create a copy of the database, putting tables in one database and the query, forms, etc. in the other, then compile the query, forms, etc. When you need to make changes, you must make changes to the original databases, make a copy of it, then recompile the database.