You may execute Aspen from most of the workstations at Rice. To do so, type "aplus" in an X-term (Unix window). It will take a about thirty seconds for the Aspen window to load. At that time, Aspen will ask you if you wish to load the program on the current node; you should answer yes. After the simulation engine has loaded, Aspen will want to know if you want to start a new file or edit an old one. If you ask Aspen to load an existing file, a window will appear which allows you to sift through your directories until you find the file that you want. If you start a new file, Aspen will ask you what you units you would to use in your model. For CENG 403, "General with Metric Units" will be appropriate.