Win 10 had changed the number of the serial port used to generate CW. N6EE helped me find the solution. Once I correctly set the number of the serial port used to generate CW, all became well again. 73, Al, K6RIM -- Albert C. Burnham 45 Berens Drive Kentfield, CA 94904 Cell: (415) 810-4839 email: k6rim at pacbell.net