[rules-users] sliding time in lhs

Hi! i'm new to use a drools-fusion, i've a next lhs condition in rule: $o: Order(status!="EU_C_R1_INIT") SystemConfig(value:value) from hbnSession.createQuery("from SystemConfig where name=:name").setString("name","nRicMax").uniqueResult() $nRic : Number(intValue < value) from accumulate($n: Order(this==$o) over window:time(1d),count($n)) Data: 1) Order 1 date 28 aug 2009 EU_C_INIT 2) Order 1 date 31 aug 2009 EU_A_INIT 3) Order 1 date 31 aug 2009 EU_B_INIT 4) Order 1 date 30 aug 2009 EU_B_INIT 5) Order 1 date 28 aug 2009 EU_A_INIT 6) Order 1 date 01 aug 2009 EU_A_INIT 7) Order 1 date 28 aug 2009 EU_C_INIT 8) Order 1 date 28 aug 2009 EU_C_INIT Only the first condition is verified [ Order(status!="EU_C_R1_INIT") ] altough there are facts that verify Order(this==$o) over window:time(24h) ] There are n-k facts that don't verify a previous condition but them come count also: I espect that drools count a 2-3-4 but it count also 5-6-7: i'm confused P.S. i did set a stream mode, i' had set a timestamp attribute in event fact @timestamp(myTimestampLong), i tried with pseudo clock (making it advance for new Date().getTime() or at origin, therefore 01 jan 1970 [without event @timestamp attribute] ) Regards Francesco