Hi, I have a rule written which compare objects with objects present in HashMap and if object is found then clause gets executed. I am able to wite the conditions for comparing with HashMap but if I add any assign any value from the fact object before comparison then my conditions fail to evaluate and my then clause runs for all the objects Below is the code rule "rule 1" when //$factData: ConcentrationDataTable() this line makes rule fail TempStorage($mapObject : concPercentRefObjects) ConcentrationDataTable($concPercentage : concPercentage) $referenceData : ConcentrationDataTable($keyObject : concPercentRefkey) eval( $mapObject.get($keyObject) != null ) and eval($concPercentage > (((ConcPercentRef)$mapObject.get($keyObject)).getPercent())) then System.out.println("Rule 222 executed "+ " condition "+$factData + " reference value "+$mapObject.get($keyObject) ); //filteredDataList.add($factData); I require this object(fact object) to be stored in list for further process end *Results * Rule 222 executed condition 1424975 1424975 key value value 1424975 Rule 222 executed condition 14249751 14249751 key value 1424975 -- failed result should not have got printed -- View this message in context: http://drools.46999.n3.nabble.com/Drools-conddition-fails-if-I-use-HashMa... Sent from the Drools: User forum mailing list archive at Nabble.com.