java.lang.NoClassDefFoundError: This exception has no message.

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java.lang.NoClassDefFoundError:
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:242)
at oracle.jbo.common.java2.JDK2ClassLoader.loadClassForName(JDK2ClassLoader.java:38)
at oracle.jbo.common.JBOClass.forName(JBOClass.java:164)
at oracle.jbo.common.JBOClass.findCustomClass(JBOClass.java:177)
at oracle.jbo.server.EntityDefImpl.loadFromXML(EntityDefImpl.java:2450)
at oracle.jbo.server.EntityDefImpl.loadFromXML(EntityDefImpl.java:2275)
at oracle.jbo.server.MetaObjectManager.loadFromXML(MetaObjectManager.java:522)
at oracle.jbo.mom.DefinitionManager.loadLazyDefinitionObject(DefinitionManager.java:547)
at oracle.jbo.mom.DefinitionManager.findDefinitionObject(DefinitionManager.java:425)
at oracle.jbo.mom.DefinitionManager.findDefinitionObject(DefinitionManager.java:358)
at oracle.jbo.mom.DefinitionManager.findDefinitionObject(DefinitionManager.java:340)
at oracle.jbo.server.MetaObjectManager.findMetaObject(MetaObjectManager.java:700)
at oracle.jbo.server.EntityDefImpl.findDefObject(EntityDefImpl.java:339)
at oracle.jbo.server.ViewDefImpl.doAddEntityUsage(ViewDefImpl.java:2914)
at oracle.jbo.server.ViewDefImpl.loadEntityReference(ViewDefImpl.java:2983)
at oracle.jbo.server.ViewDefImpl.loadFromXML(ViewDefImpl.java:2170)
at oracle.jbo.server.ViewDefImpl.loadFromXML(ViewDefImpl.java:1983)
at oracle.jbo.server.MetaObjectManager.loadFromXML(MetaObjectManager.java:526)
at oracle.jbo.mom.DefinitionManager.loadLazyDefinitionObject(DefinitionManager.java:547)
at oracle.jbo.mom.DefinitionManager.findDefinitionObject(DefinitionManager.java:425)
at oracle.jbo.mom.DefinitionManager.findDefinitionObject(DefinitionManager.java:358)
at oracle.jbo.mom.DefinitionManager.findDefinitionObject(DefinitionManager.java:340)
at oracle.jbo.server.MetaObjectManager.findMetaObject(MetaObjectManager.java:700)
at oracle.jbo.server.ViewDefImpl.findDefObject(ViewDefImpl.java:394)
at oracle.jbo.server.ApplicationModuleDefImpl.loadViewObject(ApplicationModuleDefImpl.java:493)
at oracle.jbo.server.ApplicationModuleImpl.doFindViewObject(ApplicationModuleImpl.java:2702)
at oracle.jbo.server.ApplicationModuleImpl.findViewObject(ApplicationModuleImpl.java:2840)
at oracle.apps.po.document.server.DocumentAMImpl.getPoHeaderMergeVO(DocumentAMImpl.java:90)
at oracle.apps.po.document.server.DocumentAMImpl.getHeaderRow(DocumentAMImpl.java:149)
at oracle.apps.po.document.server.PoControlActionsSvrCmd.isConvertCurrencyValid(PoControlActionsSvrCmd.java:2988)
at oracle.apps.po.document.server.PoControlActionsSvrCmd.isValidAction(PoControlActionsSvrCmd.java:1478)
at oracle.apps.po.document.server.PoControlActionsSvrCmd.initControlActionsList(PoControlActionsSvrCmd.java:976)
at oracle.apps.po.document.server.PoHeadersSummaryVOImpl.executeQuery(PoHeadersSummaryVOImpl.java:69)
at oracle.apps.fnd.framework.server.OAViewObjectImpl.initQuery(OAViewObjectImpl.java:753)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.setCriteriaOnVO(OAWebBeanHelper.java:2332)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.setCriteriaOnVO(OAWebBeanHelper.java:2304)
at oracle.apps.fnd.framework.webui.OAQueryHelper.handleCustomizeGoButtonAfterController(OAQueryHelper.java:2607)
at oracle.apps.fnd.framework.webui.OAQueryHelper.setCurrentCustomization(OAQueryHelper.java:4971)
at oracle.apps.fnd.framework.webui.OAQueryHelper.prepareCustomizationPickListOnProcessRequest(OAQueryHelper.java:6265)
at oracle.apps.fnd.framework.webui.OAQueryHelper.renderCustomize(OAQueryHelper.java:2000)
at oracle.apps.fnd.framework.webui.OAQueryHelper.processRequestAfterController(OAQueryHelper.java:633)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:654)
at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:251)
at oracle.apps.fnd.framework.webui.OAQueryHelper.processRequest(OAQueryHelper.java:555)
at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java:350)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:964)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:931)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:655)
at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:251)
at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java:350)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:964)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:931)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:655)
at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:251)
at oracle.apps.fnd.framework.webui.OASubTabLayoutHelper.processRequest(OASubTabLayoutHelper.java:433)
at oracle.apps.fnd.framework.webui.beans.layout.OASubTabLayoutBean.processRequest(OASubTabLayoutBean.java:465)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:964)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:931)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:655)
at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:251)
at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java:350)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:964)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:931)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:655)
at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:251)
at oracle.apps.fnd.framework.webui.OAPageLayoutHelper.processRequest(OAPageLayoutHelper.java:1166)
at oracle.apps.fnd.framework.webui.beans.layout.OAPageLayoutBean.processRequest(OAPageLayoutBean.java:1569)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:964)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:931)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:655)
at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:251)
at oracle.apps.fnd.framework.webui.beans.form.OAFormBean.processRequest(OAFormBean.java:385)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:964)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:931)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:655)
at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:251)
at oracle.apps.fnd.framework.webui.beans.OABodyBean.processRequest(OABodyBean.java:353)
at oracle.apps.fnd.framework.webui.OAPageBean.processRequest(OAPageBean.java:2497)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:1893)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:537)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:425)

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