5NN %3 (would produce 5NN 001, 002, 003, etc....) Mel, On the main menu when you go to Setup/CW messages you can then press F1 for a nice section of help to discover this. There is also a "cut" setting in your writelog.ini file that will help determine if a 0 is 0 or a A, 9 a 9 or a N, etc.. Jay - KT5E Mel Bach wrote: > How do I use the serial number generator for WPX as an example? > _______________________________________________ > WriteLog mailing list > WriteLog at contesting.com > http://lists.contesting.com/mailman/listinfo/writelog > WriteLog on the web: http://www.writelog.com/ >>>