I am having an issue with a very (VERY) simple rule. This is being called from a rule flow. There are 2 "Testval" facts, both have an "xval" of 300. When the flow is executed i get the following output Total xval: 0.0 300 Total xval: 0.0 300 This shows me a few things 1) The rule is firing 2) My facts are populated correctly with values However the Sum is not working and always has a result of 0.0. ------------------------------------------------------------------------------------ dialect "java" ruleflow-group "TestSum" when Testval($xval2:xval) $total:Number() from accumulate( Testval($xval:xval), sum($xval) ) then System.out.println("Total xval: " + $total); System.out.println($xval2); ----------------------------------- I simplified the rule to see if i was loosing my mind. With the below rule the sum works correctly (as it is summing the static value (1). And i get the following output: Total xval: 2.0 ------------------------------------------------------------------------------------ dialect "java" ruleflow-group "TestSum" when $total:Number() from accumulate( Testval($xval:xval), sum(1) ) then System.out.println("Total xval: " + $total); ----------------------------------- I have been racking my brain for a full day now..any pointers would be great! Thanks gurus Steve -- View this message in context: http://drools.46999.n3.nabble.com/Issue-with-simple-accumulate-sum-rule-t... Sent from the Drools: User forum mailing list archive at Nabble.com.