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

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This exception has no message.
java.lang.NullPointerException: 	at oracle.sysman.core.model.targetauth.AppServerLogin.loginAction(AppServerLogin.java:1203)	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:597)	at com.sun.el.parser.AstValue.invoke(Unknown Source)	at com.sun.el.MethodExpressionImpl.invoke(Unknown Source)	at org.apache.myfaces.trinidad.component.MethodExpressionMethodBinding.invoke(MethodExpressionMethodBinding.java:46)	at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)	at org.apache.myfaces.trinidad.component.UIXCommand.broadcast(UIXCommand.java:190)	at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:475)	at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:756)	at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._invokeApplication(LifecycleImpl.java:788)	at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:306)	at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:186)	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)	at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)	at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)	at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)	at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)	at oracle.help.web.rich.OHWFilter.doFilter(Unknown Source)	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)