hi musleman thanks for great kdat tutorial.can you explain what kdat means when you use "delete not stored sources",because those sources do not have blank or zero in their source node or supernode columns.also i have never seen any blank or zero entries in these two columns,am i just lucky or have i got hold of the wrong end of this stick? i run kazaa lite k++ version 2.4.3 with kdat 1.2.5