NB.***************************in ijs************** f0=: 3 :0 f1 3 ) f1=:3 :0 a=.3+y b=.3+a c=.3+b ) ********************************** In ijx: 13!:3'f0 0' <ctl k> f0 10 <step in> single step<enter> to f1[2] run cursor over f1[1] click on stop manager,then stop line,then close ******************no stop on f1[1]************ ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm