Hi Stefan, I'm puzzled with the subroutine build_1d_filt in postpro.f. Could you please give some papers on this problem? Regards, Zhicheng 2009-10-17 王志成 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/nek5000-users/attachments/20091017/9efda27d/attachment.html>