-+ fprintf(f, " last_len");
-+ for(i=0; i < stnc->tin_cnt; i++)
-+ fprintf(f, "%12u", stnc->last_skblen[i]);
-+ fprintf(f, "\n");
++ if(stnc->version >= 4) {
++ fprintf(f, " un_flows");
++ for(i=0; i < stnc->tin_cnt; i++)
++ fprintf(f, "%12u", stnc->unresponse_flows[i]);
++ fprintf(f, "\n");
++ }