Drools map usage nullpointer exception -------------------------------------- Key: DROOLS-903 URL: https://issues.jboss.org/browse/DROOLS-903 Project: Drools Issue Type: Feature Request Components: core engine Affects Versions: 5.6.0.Final Reporter: Abrham Kampur Assignee: Mario Fusco My rules file looks like rule"rule1 test" when rules:Rules(rules.getRulesParamMap().get("01").getActual()>=rules.getRulesParamMap().get("01").getThreshold()) then RuleResult ruleResult=new RuleResult() ruleResult.setRulePassed(false); rules.getRulesResultMap().put("01",ruleResult); System.out.println("Rule failed. "); retract(rules) end Note: Rules is a clas which has rulesParamMap and ruleResultMap attributes. Ruleresult is also a class with fields actual and threshold