Thanks for leaving this here. I ran into the same problem, and fixed it with the advice here. I'm pretty sure I got the idiom that led to the trouble from some HowTo; unfortunately, I can't remember the source. -- Ross Boylan wk: (415) 514-8146 185 Berry St #5700 ross@biostat.ucsf.edu Dept of Epidemiology and Biostatistics fax: (415) 514-8150 University of California, San Francisco San Francisco, CA 94107-1739 hm: (415) 550-1062