[EpiData-list] aggregate counts

Dear colleagues from my rec file with individual data I created and aggregate file with district, agegroup and year of notification. For each combination I have a cummulative count of cases. Now I am not able to use this aggregate table as it was possible in Epiinfo v6. Something like:

sumtable agegroup n /by=district (to have a agegroup table with cumulative numbers for each district)

Thanks for advise