Hi All, I defined Declarative model, Bank with fields( name, accntno, balance, deposit) in com.simple package in Guvnor-5.2, and also defined one Guided rule and one test scenario and tested successfully in Guvnor. But when I am trying to use same Declarative model(Bank) through API's in Eclipse, I am getting following error, java.lang.NullPointerException Here is my Declarativemainclass: In Eclipse, I defined BankDTableChangeSet.xml and Declarativemainclass.java defined in com/model package. public class Declarativemainclass { public static void main(String args[]) { try { // get a reference to a knowledge base with a declared type: KnowledgeBase kbase =createKnowledgeBase(); // get the declared FactType from Guvnor FactType bankType = (FactType) kbase.getFactType( "com.simple", "Bank" ); // Here I am getting above exception // handle the type as necessary: // create instances: Object bank = bankType.newInstance(); // set attributes values bankType.set(bank, "name","Govinda"); bankType.set(bank, "accntno", 498); // insert fact into a session StatefulKnowledgeSession ksession =kbase.newStatefulKnowledgeSession(); ksession.insert(bank); ksession.fireAllRules(); // read attributes int value1=(Integer) bankType.get(bank, "balance"); int value2=(Integer) bankType.get(bank,"deposit"); System.out.println(value1+"\t"+value2); } catch(Exception e) { System.out.println(e); } } private static KnowledgeBase createKnowledgeBase() { KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent("BankAgent"); Resource changeset = ResourceFactory.newClassPathResource("com/model/BankDTableChangeSet.xml"); kagent.applyChangeSet(changeset); KnowledgeBase kbase = kagent.getKnowledgeBase(); return kbase; } } Please help me anyone... Thanks and regards 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