The zipping method to make the FNplot.exe file by mailer was as follows. • Renaming-1. FNplot.exe >>>> FNplot-exe • Zipping -1. (result = FNplot-exe.zip) • Renaming-2. FNplot-exe.zip >>>> FNplot-exe-zip • Zipping -2. (result = FNplot-exe-zip.zip) The last file is sendable. To gain the FNplot.exe follow the inverse instructions backward.