Ok got it, Thanks alot. Regards Manohar Kokkula Mailto: manohar.kokkula(a)tcs.com From: Tan Hui Onn <huionn(a)gmail.com&gt; To: Rules Users List <rules-users(a)lists.jboss.org&gt; Date: 09/23/2011 04:39 PM Subject: Re: [rules-users] Exception in Banking Tutorial in Drools expert guide... Sent by: rules-users-bounces(a)lists.jboss.org Obviously, it should be for (int i=0; i < facts.length;i++), right? 2011/9/23 Manohar Kokkula <manohar.kokkula(a)tcs.com&gt; Hi, I am trying to execute Banking Tutorial Example given in Drools expert( http://downloads.jboss.com/drools/docs/5.0.1.26597.FINAL/drools-expert/ht... ),but im getting following error, Exception in thread "main" java.lang.ClassCastException: java.util.ArrayList cannot be cast to org.hibernate.mapping.Collection at com.sample.RuleRunner.runRules(RuleRunner.java:32) at com.sample.Example1.main(Example1.java:5) And when i try to resolve this i am getting another error: java.lang.ArrayIndexOutOfBoundsException: 0 at com.code.RuleRunner.runRules(RuleRunner.java:45) at com.code.Example1.main(Example1.java:5) Code snippet : for (int i=0; i <=facts.length;i++) { System.out.println("222"); Object fact = facts[i]; //The error is for this line of code System.out.println( "Inserting fact: " + fact ); ksession.insert(fact); System.out.println("333"); } could any body help me on this. Manohar Kokkula Mailto: manohar.kokkula(a)tcs.com =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users