When a new concern graph is created, user is asked to give the name for a file in which the concern will be saved to. However, it's recommended to perform the save action regularly during the process of fill up the concern graph. It is also necessary to save or save as.. the concern graph before closing Eclipse or creating a new concern graph.
How to save the concern:
important: the location of the concern file is critical when FEAT load the concern graph again in a later session. By default, FEAT belives that the project in which the file reside is the project the concern built upon. So when you perform save as.. action, make sure you save it under the project described by concern.