New Window
Browsers give users the option to open pages in a new window. Because it is a feature of web browsers it cannot be disabled. But it is strongly recommended that users are discouraged from using it. If the same report is opened twice in separate windows, and two write-back operations are started, the database may be corrupted with inconsistent data. This is because, when you open a new window, it is opened from within the parent browser. This is invisible to the web server and so it cannot distinguish between the two browser processes.