To control access to the DataWindow Designer system tables at your site, you can specify that DataWindow Designer not create or update the system tables or that the system tables be accessible only to certain users or groups.
You can control system table access by doing any of the following:
Setting Use Extended Attributes Set the Use Extended Attributes database preference in the Database Preferences dialog box in the Database painter.
Setting Read Only Set the Read Only database preference in the Database Preferences dialog box in the Database painter.
Granting permissions on the system tables Grant explicit permissions on the system tables to users or groups at your site.