Program is started by the command searchdup with no parameters. The graphic user interface appears, with all parameters to their default value. After parameter entry, the button START starts data processing. The status window displays the current program activity (Reading, sorting and writing output file). It is possible to stop the program clicking button BREAK!.
When the program has completed its operations, it returns to the parameter input mode. It is then possible to change some parameters, or to exit the program, by clicking on the EXIT button.