interval type

I am trying to print out an interval counter and am not having any luck printing values > 99 hours. Is their any way to format this ? My code looks like this, callduration is defined as an interval hour to second after group of rpt.username print column 1, username, column 18, "calls", column 24, group count(*) using "########", column 35, group sum(rpt.callduration), column 50, group min(rpt.callduration), column 60, group max(rpt.callduration), column 70, group avg(rpt.callduration) on last row skip 1 line print column 1, "Totals", column 18, "calls:", column 24, count(*) using "########", column 35, sum(rpt.callduration), column 50, min(rpt.callduration), column 60, max(rpt.callduration), column 70, avg(rpt.callduration)