Much of the courseware has been engineered for optimal streaming over the Web. Depending on the variables of your computer's configuration and connection speed, performance can vary. There have been reported cases where users have received repeated script errors. This occurs when a user exits from a simulation screen (any screen that simulates the application) or a screen that contains a play animation. By leaving from one of these screens and returning on a subsequent log on, the performance of the computer may not have enough bandwidth to load all of the cast members needed for that screen and creates a script error.
To avoid script errors altogether, it is recommended that when exiting a course, do not do so from a step simulation or a play animation screen (sample below). A user should either navigate to the end of the topic or leave from a screen that has just text and plain graphics.
Solution
Clear the Internet Explorer Cache
Delete the user.dat file from your machine