The bug with i.ifft is a known bug - but it hasn't been fixed yet. --------------------------------------------------------------------- Michael Shapiro U.S. Army CERL email: shapiro@zorro.cecer.army.mil Environmental Division phone: (217) 352-6511 ext 526 P.O. Box 9005 fax: (217) 373-7222 Champaign, Ill. 61826-9005 ---------------------------------------------------------------------