There was a short thread on NumPy and Pickling back in June, started by this msg: http://www.python.org/pipermail/matrix-sig/1999-June/002909.html with followups by Hinson and Ascher. Just wondering where this stands at the moment. Thanks, -- John A. Turner Senior Research Associate Blue Sky Studios, One South Rd, Harrison, NY 10528 http://www.blueskystudios.com/ (914) 381-8400