from numpy import * from scipy import fftpack a = ones((64,64)) b = fftpack.fft2(a) the system display: Process Python 毯 (core dumped) why? thank you -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.scipy.org/pipermail/scipy-user/attachments/20080622/db2709e6/attachment.html>