All pages within a script must be linked from and to another page. Pages can be linked in a variety of ways, however the most common controls to use are the GoToPage control, and the series of Button controls.
Before test running scripts or setting scripts "Live" you should always check the links in the script. Failure to do so can result in incomplete script runs where a script fails to reach its end page, even in the script editor. These can also occur where an agent has ended a script run by closing the browser window. See Agent Desktop - Script List for further information.