SAP EP6.0 SP3 initial logon error

Hi all,

I have installed WebAs6.40 with both Abap and Java engine in a single host.Then i installed EP6.0 SP3.Everything went smooth.But while logging on for the first time into the portal it throws an error stating that,

500 Internal Server Error

Application error occurs during processing the request.

Details: java.lang.NullPointerException

at com.sap.portal.navigation.Gateway.addAliasData(Gateway.java:156)

at com.sap.portal.navigation.Gateway.doInit(Gateway.java:105)

at com.sap.portal.navigation.Gateway.service(Gateway.java:33)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:363)

at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:222)

at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:323)

at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:301)

at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:682)

at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:220)

at com.sap.engine.services.httpserver.server.Client.handle(Client.java:94)

at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:142)

at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:37)

at com.sap.engine.core.cluster.impl6.session.UnorderedChannel$MessageRunner.run(UnorderedChannel.java:71)

at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)

at java.security.AccessController.doPrivileged(Native Method)

at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:100)

at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:162)

Can anyone help me in this regard.

Gopi