On Sun, Oct 02, 2011 at 02:12:26PM BST, Richard Bown wrote: > sleep 1 > cd /home/richard/SDR/wsjt-rev2454/ > python wsjt.py Drop the 'cd' and try: python /home/richard/SDR/wsjt-rev2454/wsjt.py If that doesn't help, define PATH in the script or use full path to the binaries/scripts you're calling. Regards, -- Raf