Hello, Probably an error of beginner ... E=ets:new('my_table',[]), ets:insert(E,{123,1}), ets:insert(E,{456,2}), The following command find the key 123 and return the object 1 ets:lookup(E,123), The following command returns empty ! R1=ets:match(E,{'_',2,'$1'}), How to find the object 2 ? J-Ph. Constantin ITS3 Genève www.its3.ch