... it doesn't work under 0.6, and this has been a showstopper for my group. TIA, -Jonathan Jonathan Epstein Jonathan_Epstein@nih.gov Head, Unit on Biologic Computation (301)402-4563 Office of the Scientific Director Bldg 31, Room 2A47 Nat. Inst. of Child Health & Human Development 31 Center Drive National Institutes of Health Bethesda, MD 20892