I have just upgraded to Zimbra 7.1.1 and immediately after that I was not able to connect with the server. I have been trying to check for something not correctly mainteined from old to new version but without results.
I include in this message the details of the error.

Can anybody help me ?

Thanks in advance.

Si Ť verificato un errore del servizio di rete. (i.e.: A network service error has occurred.)
method: [unknown]
msg: system failure: java.lang.NullPointerException
code: service.FAILURE
detail: soap:Receiver
trace: com.zimbra.common.service.ServiceException: system failure: java.lang.NullPointerException ExceptionId:btpool0-23:1313226950453:87e39363c4eb67a1 Code:service.FAILURE at com.zimbra.common.service.ServiceException.FAILURE (ServiceException.java:248) at com.zimbra.soap.SoapEngine.dispatchRequest(SoapEng ine.java:438) at com.zimbra.soap.SoapEngine.dispatch(SoapEngine.jav a:287) at com.zimbra.soap.SoapEngine.dispatch(SoapEngine.jav a:158) at com.zimbra.soap.SoapServlet.doWork(SoapServlet.jav a:294) at com.zimbra.soap.SoapServlet.doPost(SoapServlet.jav a:215) at javax.servlet.http.HttpServlet.service(HttpServlet .java:725) at com.zimbra.cs.servlet.ZimbraServlet.service(Zimbra Servlet.java:208) at javax.servlet.http.HttpServlet.service(HttpServlet .java:814) at org.mortbay.jetty.servlet.ServletHolder.handle(Ser vletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler.handle(Se rvletHandler.java:390) at org.mortbay.jetty.security.SecurityHandler.handle( SecurityHandler.java:218) at org.mortbay.jetty.servlet.SessionHandler.handle(Se ssionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(Co ntextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebA ppContext.java:422) at org.mortbay.jetty.handler.ContextHandlerCollection .handle(ContextHandlerCollection.java:230) at org.mortbay.jetty.handler.HandlerCollection.handle (HandlerCollection.java:114) at org.mortbay.jetty.handler.HandlerWrapper.handle(Ha ndlerWrapper.java:152) at org.mortbay.jetty.handler.rewrite.RewriteHandler.h andle(RewriteHandler.java:230) at org.mortbay.jetty.handler.HandlerWrapper.handle(Ha ndlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(Htt pConnection.java:543) at org.mortbay.jetty.HttpConnection$RequestHandler.co ntent(HttpConnection.java:946) at org.mortbay.jetty.HttpParser.parseNext(HttpParser. java:756) at org.mortbay.jetty.HttpParser.parseAvailable(HttpPa rser.java:218) at org.mortbay.jetty.HttpConnection.handle(HttpConnec tion.java:405) at org.mortbay.io.nio.SelectChannelEndPoint.run(Selec tChannelEndPoint.java:410) at org.mortbay.thread.BoundedThreadPool$PoolThread.ru n(BoundedThreadPool.java:451) Caused by: java.lang.NullPointerException at com.zimbra.common.soap.Element$JSONElement.(Elemen t.java:581) at com.zimbra.common.soap.Element$JSONElement$JSONFac tory.createElement(Element.java:586) at com.zimbra.soap.ZimbraSoapContext.createElement(Zi mbraSoapContext.java:609) at com.zimbra.soap.DocumentHandler.getResponseElement (DocumentHandler.java:61) at com.zimbra.cs.service.offline.OfflineServiceProxy. handle(OfflineServiceProxy.java:51) at com.zimbra.cs.service.offline.OfflineSearchCalenda rResources.handle(OfflineSearchCalendarResources.j ava:33) at com.zimbra.soap.SoapEngine.dispatchRequest(SoapEng ine.java:412) ... 26 more
request:

negri.an@libero.it0_751ca6e696ba092b68f3bc9fd8c9ebb4ed37a55e_69643d3 3363a66666666666666662d666666662d666666662d6666666 62d6666666666666666666666663b6578703d31333a3133343 43736323934363831323b747970653d363a7a696d6272613b