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java.lang.NullPointerException: 	at xxlc.oracle.apps.okc.articles.variables.server.XXLCVariablesAMImpl.handleVariableEvent(XXLCVariablesAMImpl.java:174)	at xxlc.oracle.apps.okc.articles.variables.server.XXLCVariablesAMImpl.initializePVO(XXLCVariablesAMImpl.java:209)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:585)	at oracle.apps.fnd.framework.server.OAUtility.invokeMethod(Unknown Source)	at oracle.apps.fnd.framework.server.OAUtility.invokeMethod(Unknown Source)	at oracle.apps.fnd.framework.server.OAApplicationModuleImpl.invokeMethod(Unknown Source)	at xxlc.oracle.apps.okc.articles.variables.webui.XXLCUpdDefnVariablesCO.processRequest(XXLCUpdDefnVariablesCO.java:54)	at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(Unknown Source)	at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(Unknown Source)	at oracle.apps.fnd.framework.webui.OAPageLayoutHelper.processRequest(Unknown Source)	at oracle.apps.fnd.framework.webui.beans.layout.OAPageLayoutBean.processRequest(Unknown Source)	at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(Unknown Source)	at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(Unknown Source)	at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(Unknown Source)	at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(Unknown Source)	at oracle.apps.fnd.framework.webui.beans.form.OAFormBean.processRequest(Unknown Source)	at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(Unknown Source)	at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(Unknown Source)	at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(Unknown Source)	at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(Unknown Source)	at oracle.apps.fnd.framework.webui.beans.OABodyBean.processRequest(Unknown Source)	at oracle.apps.fnd.framework.webui.OAPageBean.processRequest(Unknown Source)	at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(Unknown Source)	at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(Unknown Source)	at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(Unknown Source)