I Get the Below Error I Have Copied the Stacktrace Below. I Get an Null Pointer Ex Ception

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I get the below error I have copied the Stacktrace below. I get an null pointer ex ception.

Oct 9, 2012 10:14:34 AM org.apache.catalina.core.AprLifecycleListener init

INFO: The APR based Apache Tomcat Native library which allows optimal performanc e in production environments was not found on the java.library.path: C:\Program

Files\Java\jdk1.6.0_13\bin;.;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Wind ows;D:\oraclexe\app\oracle\product\11.2.0\server\bin;C:\Windows\system32;C:\Wind ows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Prog ram Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:

\Program Files\WIDCOMM\Bluetooth Software\ Oct 9, 2012 10:14:34 AM org.apache.coyote.http11.Http11Protocol init

INFO: Initializing Coyote HTTP/1.1 on http-12345

Oct 9, 2012 10:14:34 AM org.apache.catalina.startup.Catalina load

INFO: Initialization processed in 344 ms

Oct 9, 2012 10:14:34 AM org.apache.catalina.core.StandardService start

INFO: Starting service Catalina

Oct 9, 2012 10:14:34 AM org.apache.catalina.core.StandardEngine start

INFO: Starting Servlet Engine: Apache Tomcat/6.0.18

Oct 9, 2012 10:14:34 AM org.apache.catalina.startup.HostConfig deployDescriptor

WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIProject inside the

host appBase has been specified, and will be ignored

Oct 9, 2012 10:14:35 AM org.apache.catalina.session.PersistentManagerBase start

SEVERE: No Store configured, persistence disabled

WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIAccessibilityEngin e inside the host appBase has been specified, and will be ignored

WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIBirtReportEngine i nside the host appBase has been specified, and will be ignored

WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIChartEngine inside the host appBase has been specified, and will be ignored

WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBICommonJEngine insi de the host appBase has been specified, and will be ignored

WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIConsoleEngine insi de the host appBase has been specified, and will be ignored

WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIGeoEngine inside t he host appBase has been specified, and will be ignored

WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIGeoReportEngine in side the host appBase has been specified, and will be ignored

WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIJasperReportEngine inside the host appBase has been specified, and will be ignored

WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIJPaloEngine inside

the host appBase has been specified, and will be ignored

WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIJPivotEngine insid e the host appBase has been specified, and will be ignored

WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIJPXMLAEngine insid e the host appBase has been specified, and will be ignored log4j:ERROR Could not find value for key log4j.appender.SpagoBIGeoEngine log4j:ERROR Could not instantiate appender named "SpagoBIGeoEngine".

WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIMobileEngine insid e the host appBase has been specified, and will be ignored

SEVERE: No Store configured, persistence disabled Oct 9, 2012 10:15:10 AM org.apache.catalina.startup.HostConfig deployDescriptor

WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIQbeEngine inside t he host appBase has been specified, and will be ignored

WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBITalendEngine insid e the host appBase has been specified, and will be ignored

WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIWekaEngine inside the host appBase has been specified, and will be ignored

Oct 9, 2012 10:15:15 AM org.apache.coyote.http11.Http11Protocol start

INFO: Starting Coyote HTTP/1.1 on http-12345

Oct 9, 2012 10:15:15 AM org.apache.jk.common.ChannelSocket init

INFO: JK: ajp13 listening on /0.0.0.0:8009

Oct 9, 2012 10:15:15 AM org.apache.jk.server.JkMain start

INFO: Jk running ID=0 time=0/39 config=null

Oct 9, 2012 10:15:15 AM org.apache.catalina.startup.Catalina start

INFO: Server startup in 41240 ms it.eng.spagobi.kpi.model.service.ManageModelInstancesAction.doService: java.lang.NullPointerException at it.eng.spagobi.kpi.model.service.ManageModelInstancesAction.deseriali zeJSONArray(ManageModelInstancesAction.java:872)

at it.eng.spagobi.kpi.model.service.ManageModelInstancesAction.doService

(ManageModelInstancesAction.java:188)

at it.eng.spagobi.commons.services.AbstractSpagoBIAction.service(Abstrac tSpagoBIAction.java:68)

at it.eng.spago.dispatching.action.ActionCoordinator.invokeServiceBusine ss(ActionCoordinator.java:209)

at it.eng.spago.dispatching.action.ActionCoordinator.service(ActionCoord inator.java:158)

at it.eng.spago.dispatching.httpchannel.AdapterHTTP.service(AdapterHTTP. java:418)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl icationFilterChain.java:290)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF ilterChain.java:206)

at it.eng.spagobi.commons.filters.ProfileFilter.doFilter(ProfileFilter.j ava:109)

at it.eng.spagobi.commons.filters.SpagoBICoreCheckSessionFilter.doFilter

(SpagoBICoreCheckSessionFilter.java:80) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl icationFilterChain.java:235)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV alve.java:233)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV alve.java:191)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j ava:128)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j ava:102)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal ve.java:109)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav a:286)

at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java

at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce ss(Http11Protocol.java:583)

at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:44

at java.lang.Thread.run(Thread.java:619) it.eng.spagobi.commons.utilities.SpagoBIServiceExceptionHandler.logError: Except ion saving model instance nodes it.eng.spagobi.commons.utilities.SpagoBIServiceExceptionHandler.logError: The er ror root cause is: java.lang.NullPointerException it.eng.spagobi.commons.utilities.SpagoBIServiceExceptionHandler.logError: The er ror root cause stack trace is: it.eng.spagobi.utilities.exceptions.SpagoBIServiceException: Exception saving mo del instance nodes

at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl icationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF ilterChain.java:206)

(SpagoBICoreCheckSessionFilter.java:80)

at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:44 7)

at java.lang.Thread.run(Thread.java:619)

Caused by: java.lang.NullPointerException

at it.eng.spagobi.kpi.model.service.ManageModelInstancesAction.deseriali zeJSONArray(ManageModelInstancesAction.java:872)

... 23 more it.eng.spagobi.commons.utilities.SpagoBIServiceExceptionHandler.logError: The er ror full stack trace is: it.eng.spagobi.utilities.exceptions.SpagoBIServiceException: Exception saving mo del instance nodes

at it.eng.spagobi.commons.utilities.SpagoBIServiceExceptionHandler.getWr appedException(SpagoBIServiceExceptionHandler.java:86)

at it.eng.spagobi.commons.services.AbstractSpagoBIAction.handleException

(AbstractSpagoBIAction.java:163)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl icationFilterChain.java:290)

(SpagoBICoreCheckSessionFilter.java:80)

at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:44

at java.lang.Thread.run(Thread.java:619)

Caused by: it.eng.spagobi.utilities.exceptions.SpagoBIServiceException: Exceptio n saving model instance nodes

... 22 more

Caused by: java.lang.NullPointerException

at it.eng.spagobi.kpi.model.service.ManageModelInstancesAction.deseriali zeJSONArray(ManageModelInstancesAction.java:872)

... 23 more