Hey, gang! I have a decision table that generated the following rule: {other rules removed} #From row number: 19 rule "postponePart_19" when PoolInfo(courtLocation == "101") PoolInfo(statusCode >= 0, statusCode <= 2) PoolInfo(numberFta < 1) PoolInfo(numberOfDeferralsPosted < 2) PoolInfo(daysBeforeSummons>= 2, daysBeforeSummons<= 999) then answer.setAnswer(true); end I call these rules with the following code (I build the ruleBase at the beginning in the factory method to be used by everything: StatelessSession session = participantRuleBase.newStatelessSession(); //now create some test data PoolInfo pool = part.getActivePool(); BooleanAnswer answer = new BooleanAnswer(); Object[] rules = new Object[]{pool, answer}; session.execute(rules); return answer.isTrue(); BooleanAnswer is simply a convenience object I created to store the answer from the rules. (If anyone has a better way to do this, please let me know.) I got the following stack trace: java.lang.NullPointerException at com.acs.gs.juror.bo.Rule_postponePart_19_0.consequence(Rule_postponePart_19_ 0.java:6) at com.acs.gs.juror.bo.Rule_postponePart_19_0ConsequenceInvoker.evaluate(Rule_p ostponePart_19_0ConsequenceInvoker.java:20) at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:545) at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:509) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.j ava:430) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.j ava:402) at org.drools.reteoo.ReteooStatelessSession.execute(ReteooStatelessSession.java :128) I'm a newbie and have no idea what to do next. Please help. Thanks. Thom Hehl Sr. eJuror Architect * Office (859) 277-8800 x 144 * Thomas.Hehl(a)acs-inc.com <mailto:Thomas.Hehl@acs-inc.com> ACS, Inc. Government Solutions 1733 Harrodsburg Road Lexington, KY 40504-3617 This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message and notify sender via e-mail at Thomas.Hehl(a)acs-inc.com <mailto:Thomas.Hehl@acs-inc.com> or by telephone at 859-277-8800 ext. 144. Thank you.