If you are viewing this tutorial from a remote site then you may need to download the Soar code for the exercises. This can be done by viewing the relevant code (which can be accessed from Program listings), and saving it as a file. This is done in Netscape, for example, by selecting the "File" option, and then choosing "Save As..." to save the code into your own directory. This code is designed to work with Soar7.
Note that when in Soar you should alter the present working directory to be the one which you downloaded the code to. Information on how to do this is given in Soar help.