Hello everyone,<br><br>I am new to Drools and has been working and studying on it for the past 3 weeks. I&#39;m currently working on a project using JBoss Seam and WebLogic (I&#39;m new to these technologies also), and there are quite number of rules that need to be implemented to the system. Below is the stack trace after I clicked on an action button from the UI that will trigger the rule action:<br>
<br>java.lang.NoClassDefFoundError: org/antlr/runtime/Parser<br>        at java.lang.ClassLoader.defineClass1(Native Method)<br>        at java.lang.ClassLoader.defineClass(ClassLoader.java:620)<br>        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)<br>
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)<br>        at java.net.URLClassLoader.access$000(URLClassLoader.java:56)<br>        at java.net.URLClassLoader$1.run(URLClassLoader.java:195)<br>        at java.security.AccessController.doPrivileged(Native Method)<br>
        at java.net.URLClassLoader.findClass(URLClassLoader.java:188)<br>        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)<br>        at java.lang.ClassLoader.loadClass(ClassLoader.java:251)<br>        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)<br>
        at org.drools.compiler.DrlParser.getParser(DrlParser.java:207)<br>        at org.drools.compiler.DrlParser.parse(DrlParser.java:60)<br>        at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:165)<br>
        at com.fms.newss.rule.util.RuleUtil_beaVersion0_938.readRule(RuleUtil.java:44)<br>        at com.fms.newss.rule.util.RuleUtil.readRule(RuleUtil.java)<br>        at com.fms.newss.rule.action.RuleAction_beaVersion0_662.doValidateRules(RuleAction.java:85)<br>
        at com.fms.newss.rule.action.RuleAction.doValidateRules(RuleAction.java)<br>        at com.fms.newss.rule.action.DummyMain_beaVersion0_656.doRule(DummyMain.java:81)<br>        at com.fms.newss.rule.action.DummyMain.doRule(DummyMain.java)<br>
        at com.fms.newss.rule.action.DummyMain.&lt;init&gt;(DummyMain.java:55)<br>        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)<br>        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)<br>
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)<br>        at java.lang.reflect.Constructor.newInstance(Constructor.java:513)<br>        at java.lang.Class.newInstance0(Class.java:355)<br>
        at java.lang.Class.newInstance(Class.java:308)<br>        at org.jboss.seam.Component.instantiateJavaBean(Component.java:1395)<br>        at org.jboss.seam.Component.instantiate(Component.java:1316)<br>        at org.jboss.seam.Component.newInstance(Component.java:2074)<br>
        at org.jboss.seam.Component.getInstance(Component.java:1978)<br>        at org.jboss.seam.Component.getInstance(Component.java:1940)<br>        at org.jboss.seam.Component.getInstance(Component.java:1934)<br>        at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:55)<br>
        at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:50)<br>        at org.jboss.seam.el.SeamELResolver.resolveBase(SeamELResolver.java:166)<br>        at org.jboss.seam.el.SeamELResolver.getValue(SeamELResolver.java:53)<br>
        at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:143)<br>        at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:64)<br>        at org.jboss.el.parser.AstIdentifier.getValue(AstIdentifier.java:44)<br>
        at org.jboss.el.parser.AstValue.getTarget(AstValue.java:34)<br>        at org.jboss.el.parser.AstValue.invoke(AstValue.java:95)<br>        at org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)<br>
        at com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68)<br>        at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:77)<br>        at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:91)<br>
        at javax.faces.component.UICommand.broadcast(UICommand.java:383)<br>        at org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:321)<br>        at org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:296)<br>
        at org.ajax4jsf.component.AjaxViewRoot.processPhase(AjaxViewRoot.java:253)<br>        at org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:466)<br>        at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:97)<br>
        at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)<br>        at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)<br>        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)<br>
        at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)<br>        at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)<br>        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)<br>
        at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)<br>        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)<br>        at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:341)<br>
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)<br>        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)<br>        at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:38)<br>
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)<br>        at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)<br>        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)<br>
        at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)<br>        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)<br>        at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)<br>
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)<br>        at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)<br>        at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)<br>
        at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:390)<br>        at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:517)<br>        at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)<br>
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)<br>        at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)<br>        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)<br>
        at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)<br>        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)<br>        at weblogic.servlet.utils.FastSwapFilter.doFilter(FastSwapFilter.java:66)<br>
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)<br>        at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)<br>        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)<br>
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3496)<br>        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)<br>
        at weblogic.security.service.SecurityManager.runAs(Unknown Source)<br>        at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2180)<br>        at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2086)<br>
        at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1406)<br>        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)<br>        at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)<br>
Caused by: java.lang.ClassNotFoundException: org.antlr.runtime.Parser<br>        at java.net.URLClassLoader$1.run(URLClassLoader.java:200)<br>        at java.security.AccessController.doPrivileged(Native Method)<br>        at java.net.URLClassLoader.findClass(URLClassLoader.java:188)<br>
        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)<br>        at java.lang.ClassLoader.loadClass(ClassLoader.java:251)<br>        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)<br>        ... 93 more<br>
java.lang.NoClassDefFoundError: org/drools/lang/DRLParser<br>        at org.drools.compiler.DrlParser.getParser(DrlParser.java:207)<br>        at org.drools.compiler.DrlParser.parse(DrlParser.java:60)<br>        at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:165)<br>
        at com.fms.newss.rule.util.RuleUtil_beaVersion0_938.readRule(RuleUtil.java:44)<br>        at com.fms.newss.rule.util.RuleUtil.readRule(RuleUtil.java)<br>        at com.fms.newss.rule.action.RuleAction_beaVersion0_662.doValidateRules(RuleAction.java:85)<br>
        at com.fms.newss.rule.action.RuleAction.doValidateRules(RuleAction.java)<br>        at com.fms.newss.rule.action.DummyMain_beaVersion0_656.doRule(DummyMain.java:81)<br>        at com.fms.newss.rule.action.DummyMain.doRule(DummyMain.java)<br>
        at com.fms.newss.rule.action.DummyMain_$$_javassist_20._d23doRule(DummyMain_$$_javassist_20.java)<br>        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)<br>        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)<br>
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)<br>        at java.lang.reflect.Method.invoke(Method.java:597)<br>        at javassist.util.proxy.RuntimeSupport$1.invoke(RuntimeSupport.java:34)<br>
        at com.fms.newss.rule.action.DummyMain_$$_javassist_20.doRule(DummyMain_$$_javassist_20.java)<br>        at com.fms.newss.rule.action.DummyMain.&lt;init&gt;(DummyMain.java:55)<br>        at com.fms.newss.rule.action.DummyMain_$$_javassist_20.&lt;init&gt;(DummyMain_$$_javassist_20.java)<br>
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)<br>        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)<br>        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)<br>
        at java.lang.reflect.Constructor.newInstance(Constructor.java:513)<br>        at java.lang.Class.newInstance0(Class.java:355)<br>        at java.lang.Class.newInstance(Class.java:308)<br>        at org.jboss.seam.Component.wrap(Component.java:1461)<br>
        at org.jboss.seam.Component.instantiateJavaBean(Component.java:1399)<br>        at org.jboss.seam.Component.instantiate(Component.java:1316)<br>        at org.jboss.seam.Component.newInstance(Component.java:2074)<br>
        at org.jboss.seam.Component.getInstance(Component.java:1978)<br>        at org.jboss.seam.Component.getInstance(Component.java:1940)<br>        at org.jboss.seam.Component.getInstance(Component.java:1934)<br>        at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:55)<br>
        at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:50)<br>        at org.jboss.seam.el.SeamELResolver.resolveBase(SeamELResolver.java:166)<br>        at org.jboss.seam.el.SeamELResolver.getValue(SeamELResolver.java:53)<br>
        at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:143)<br>        at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:64)<br>        at org.jboss.el.parser.AstIdentifier.getValue(AstIdentifier.java:44)<br>
        at org.jboss.el.parser.AstValue.getTarget(AstValue.java:34)<br>        at org.jboss.el.parser.AstValue.invoke(AstValue.java:95)<br>        at org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)<br>
        at com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68)<br>        at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:77)<br>        at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:91)<br>
        at javax.faces.component.UICommand.broadcast(UICommand.java:383)<br>        at org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:321)<br>        at org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:296)<br>
        at org.ajax4jsf.component.AjaxViewRoot.processPhase(AjaxViewRoot.java:253)<br>        at org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:466)<br>        at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:97)<br>
        at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)<br>        at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)<br>        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)<br>
        at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)<br>        at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)<br>        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)<br>
        at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)<br>        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)<br>        at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:341)<br>
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)<br>        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)<br>        at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:38)<br>
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)<br>        at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)<br>        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)<br>
        at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)<br>        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)<br>        at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)<br>
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)<br>        at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)<br>        at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)<br>
        at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:390)<br>        at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:517)<br>        at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)<br>
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)<br>        at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)<br>        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)<br>
        at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)<br>        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)<br>        at weblogic.servlet.utils.FastSwapFilter.doFilter(FastSwapFilter.java:66)<br>
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)<br>        at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)<br>        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)<br>
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3496)<br>        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)<br>
        at weblogic.security.service.SecurityManager.runAs(Unknown Source)<br>        at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2180)<br>        at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2086)<br>
        at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1406)<br>        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)<br>        at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)<br>
java.lang.NoClassDefFoundError: org/drools/lang/DRLParser<br>        at org.drools.compiler.DrlParser.getParser(DrlParser.java:207)<br>        at org.drools.compiler.DrlParser.parse(DrlParser.java:60)<br>        at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:165)<br>
        at com.fms.newss.rule.util.RuleUtil_beaVersion0_938.readRule(RuleUtil.java:44)<br>        at com.fms.newss.rule.util.RuleUtil.readRule(RuleUtil.java)<br>        at com.fms.newss.rule.action.RuleAction_beaVersion0_662.doValidateRules(RuleAction.java:85)<br>
        at com.fms.newss.rule.action.RuleAction.doValidateRules(RuleAction.java)<br>        at com.fms.newss.rule.action.DummyMain_beaVersion0_656.doRule(DummyMain.java:81)<br>        at com.fms.newss.rule.action.DummyMain.doRule(DummyMain.java)<br>
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)<br>        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)<br>        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)<br>
        at java.lang.reflect.Method.invoke(Method.java:597)<br>        at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)<br>        at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)<br>
        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)<br>        at org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:28)<br>        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)<br>
        at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:77)<br>        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)<br>        at org.jboss.seam.bpm.BusinessProcessInterceptor.aroundInvoke(BusinessProcessInterceptor.java:51)<br>
        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)<br>        at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44)<br>        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)<br>
        at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)<br>        at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:166)<br>        at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:102)<br>
        at com.fms.newss.rule.action.DummyMain_$$_javassist_20.doRule(DummyMain_$$_javassist_20.java)<br>        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)<br>        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)<br>
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)<br>        at java.lang.reflect.Method.invoke(Method.java:597)<br>        at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:329)<br>
        at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:342)<br>        at org.jboss.el.parser.AstPropertySuffix.invoke(AstPropertySuffix.java:58)<br>        at org.jboss.el.parser.AstValue.invoke(AstValue.java:96)<br>
        at org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)<br>        at com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68)<br>        at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:77)<br>
        at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:91)<br>        at javax.faces.component.UICommand.broadcast(UICommand.java:383)<br>        at org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:321)<br>
        at org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:296)<br>        at org.ajax4jsf.component.AjaxViewRoot.processPhase(AjaxViewRoot.java:253)<br>        at org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:466)<br>
        at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:97)<br>        at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)<br>        at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)<br>
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)<br>        at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)<br>        at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)<br>
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)<br>        at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)<br>        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)<br>
        at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:341)<br>        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)<br>        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)<br>
        at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:38)<br>        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)<br>        at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)<br>
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)<br>        at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)<br>        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)<br>
        at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)<br>        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)<br>        at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)<br>
        at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)<br>        at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:390)<br>        at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:517)<br>
        at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)<br>        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)<br>        at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)<br>
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)<br>        at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)<br>        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)<br>
        at weblogic.servlet.utils.FastSwapFilter.doFilter(FastSwapFilter.java:66)<br>        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)<br>        at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)<br>
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)<br>        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3496)<br>        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)<br>
        at weblogic.security.service.SecurityManager.runAs(Unknown Source)<br>        at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2180)<br>        at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2086)<br>
        at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1406)<br>        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)<br>        at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)<br>
<br>Below is the list of deployed-jboss-jars-ear.list<br><br>antlr-runtime.jar<br>core.jar<br>drools-compiler.jar<br>drools-core.jar<br>janino.jar<br>jboss-el.jar<br>jbpm-jpdl.jar<br>mvel14.jar<br>jsf-facelets.jar<br>richfaces-api.jar<br>
richfaces-impl.jar<br>richfaces-ui.jar<br>commons-*.jar<br>quartz-all-*.jar       <br><br><br>I&#39;ve been trying to solve this issues since a few days back. However I couldn&#39;t find the solution.<br>It worked fine previously until I updated my project folder from the cvs. I&#39;m afraid that there could be any missing jars.<br>
<br>Hope anyone could help me.<br><br>Thank you very much.<br><br>