I'm going to try my first sequence with conditions and I don't see a way to test the conditions in construction space. I was just wondering what's the easiest way to test it, how are other people doing it. Thanks, Bob Gonzales Binghamton University Chemistry Dept PO Box 6000 Binghamton, NY 13902 (607)777-2698 FAX: (607)777-4478 rgonzal@binghamton.edu