[rules-users] Drools 5.5 run time exception from the library code but no impact to the rule evaluation result

Just want to put the exception out here in case it is meaningful to the development or whoever ran into this before. It occurred but does not impact the result of the process. Exception in thread "Thread-6" java.lang.NullPointerException at java.lang.String.<init>(String.java:210) at org.mvel2.ast.ASTNode.toString(ASTNode.java:426) at org.mvel2.ast.Or.toString(Or.java:59) at java.lang.String.valueOf(String.java:2826) at java.lang.StringBuilder.append(StringBuilder.java:115) at org.drools.rule.constraint.ConditionAnalyzer.analyzeNode(ConditionAnalyzer.java:247) at org.drools.rule.constraint.ConditionAnalyzer.analyzeSingleCondition(ConditionAnalyzer.java:106) at org.drools.rule.constraint.ConditionAnalyzer.analyzeCondition(ConditionAnalyzer.java:99) at org.drools.rule.constraint.ConditionAnalyzer.analyzeCondition(ConditionAnalyzer.java:70) at org.drools.rule.constraint.MvelConditionEvaluator.getAnalyzedCondition(MvelConditionEvaluator.java:83) at org.drools.rule.constraint.MvelConstraint.executeJitting(MvelConstraint.java:270) at org.drools.rule.constraint.MvelConstraint.access$200(MvelConstraint.java:51) at org.drools.rule.constraint.MvelConstraint$ConditionJitter.run(MvelConstraint.java:250) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662) Sean