Hi, I am new to doorls so please can you help me. I am trying to access an ietm from a list in a rule like ... $data: List(this != null, size > 9) from accumulate( $obj1 : FwVehicle( notchCodingWire1 != null, lineVoltage != null ) over window:time(10s) from entry-point "DataStream", collectList($obj1) ) $first : $data.get(0) but i get an error ... [ERR 102] Line 164:19 mismatched input '0' expecting ')' in rule "test1" in pattern $data.get Does anyone have any ideas what I am doing wrong please? -- View this message in context: http://drools.46999.n3.nabble.com/Accessing-items-in-a-list-tp4027194.html Sent from the Drools: User forum mailing list archive at Nabble.com.