<p>I click Save.</p><p>I get the below error I have copied the Stacktrace below. I get an null pointer ex ception.</p><p>Oct 9, 2012 10:14:34 AM org.apache.catalina.core.AprLifecycleListener init</p><p>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</p><p>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:</p><p>\Program Files\WIDCOMM\Bluetooth Software\ Oct 9, 2012 10:14:34 AM org.apache.coyote.http11.Http11Protocol init</p><p>INFO: Initializing Coyote HTTP/1.1 on http-12345</p><p>Oct 9, 2012 10:14:34 AM org.apache.catalina.startup.Catalina load</p><p>INFO: Initialization processed in 344 ms</p><p>Oct 9, 2012 10:14:34 AM org.apache.catalina.core.StandardService start</p><p>INFO: Starting service Catalina</p><p>Oct 9, 2012 10:14:34 AM org.apache.catalina.core.StandardEngine start</p><p>INFO: Starting Servlet Engine: Apache Tomcat/6.0.18</p><p>Oct 9, 2012 10:14:34 AM org.apache.catalina.startup.HostConfig deployDescriptor</p><p>WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIProject inside the</p><p> host appBase has been specified, and will be ignored</p><p>Oct 9, 2012 10:14:35 AM org.apache.catalina.session.PersistentManagerBase start</p><p>SEVERE: No Store configured, persistence disabled</p><p>Oct 9, 2012 10:14:44 AM org.apache.catalina.startup.HostConfig deployDescriptor</p><p>WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIAccessibilityEngin e inside the host appBase has been specified, and will be ignored</p><p>Oct 9, 2012 10:14:45 AM org.apache.catalina.session.PersistentManagerBase start</p><p>SEVERE: No Store configured, persistence disabled</p><p>Oct 9, 2012 10:14:45 AM org.apache.catalina.startup.HostConfig deployDescriptor</p><p>WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIBirtReportEngine i nside the host appBase has been specified, and will be ignored</p><p>Oct 9, 2012 10:14:54 AM org.apache.catalina.session.PersistentManagerBase start</p><p>SEVERE: No Store configured, persistence disabled</p><p>Oct 9, 2012 10:14:54 AM org.apache.catalina.startup.HostConfig deployDescriptor</p><p>WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIChartEngine inside the host appBase has been specified, and will be ignored</p><p>Oct 9, 2012 10:14:56 AM org.apache.catalina.session.PersistentManagerBase start</p><p>SEVERE: No Store configured, persistence disabled</p><p>Oct 9, 2012 10:14:56 AM org.apache.catalina.startup.HostConfig deployDescriptor</p><p>WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBICommonJEngine insi de the host appBase has been specified, and will be ignored</p><p>Oct 9, 2012 10:14:56 AM org.apache.catalina.session.PersistentManagerBase start</p><p>SEVERE: No Store configured, persistence disabled</p><p>Oct 9, 2012 10:14:57 AM org.apache.catalina.startup.HostConfig deployDescriptor</p><p>WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIConsoleEngine insi de the host appBase has been specified, and will be ignored</p><p>Oct 9, 2012 10:14:59 AM org.apache.catalina.session.PersistentManagerBase start</p><p>SEVERE: No Store configured, persistence disabled</p><p>Oct 9, 2012 10:14:59 AM org.apache.catalina.startup.HostConfig deployDescriptor</p><p>WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIGeoEngine inside t he host appBase has been specified, and will be ignored</p><p>Oct 9, 2012 10:15:00 AM org.apache.catalina.session.PersistentManagerBase start</p><p>SEVERE: No Store configured, persistence disabled</p><p>Oct 9, 2012 10:15:01 AM org.apache.catalina.startup.HostConfig deployDescriptor</p><p>WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIGeoReportEngine in side the host appBase has been specified, and will be ignored</p><p>Oct 9, 2012 10:15:02 AM org.apache.catalina.session.PersistentManagerBase start</p><p>SEVERE: No Store configured, persistence disabled</p><p>Oct 9, 2012 10:15:02 AM org.apache.catalina.startup.HostConfig deployDescriptor</p><p>WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIJasperReportEngine inside the host appBase has been specified, and will be ignored</p><p>Oct 9, 2012 10:15:04 AM org.apache.catalina.session.PersistentManagerBase start</p><p>SEVERE: No Store configured, persistence disabled</p><p>Oct 9, 2012 10:15:04 AM org.apache.catalina.startup.HostConfig deployDescriptor</p><p>WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIJPaloEngine inside</p><p> the host appBase has been specified, and will be ignored</p><p>Oct 9, 2012 10:15:05 AM org.apache.catalina.session.PersistentManagerBase start</p><p>SEVERE: No Store configured, persistence disabled</p><p>Oct 9, 2012 10:15:05 AM org.apache.catalina.startup.HostConfig deployDescriptor</p><p>WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIJPivotEngine insid e the host appBase has been specified, and will be ignored</p><p>Oct 9, 2012 10:15:07 AM org.apache.catalina.session.PersistentManagerBase start</p><p>SEVERE: No Store configured, persistence disabled</p><p>Oct 9, 2012 10:15:07 AM org.apache.catalina.startup.HostConfig deployDescriptor</p><p>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".</p><p>Oct 9, 2012 10:15:08 AM org.apache.catalina.session.PersistentManagerBase start</p><p>SEVERE: No Store configured, persistence disabled</p><p>Oct 9, 2012 10:15:08 AM org.apache.catalina.startup.HostConfig deployDescriptor</p><p>WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIMobileEngine insid e the host appBase has been specified, and will be ignored</p><p>Oct 9, 2012 10:15:10 AM org.apache.catalina.session.PersistentManagerBase start</p><p>SEVERE: No Store configured, persistence disabled Oct 9, 2012 10:15:10 AM org.apache.catalina.startup.HostConfig deployDescriptor</p><p>WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIQbeEngine inside t he host appBase has been specified, and will be ignored</p><p>Oct 9, 2012 10:15:12 AM org.apache.catalina.session.PersistentManagerBase start</p><p>SEVERE: No Store configured, persistence disabled</p><p>Oct 9, 2012 10:15:13 AM org.apache.catalina.startup.HostConfig deployDescriptor</p><p>WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBITalendEngine insid e the host appBase has been specified, and will be ignored</p><p>Oct 9, 2012 10:15:14 AM org.apache.catalina.session.PersistentManagerBase start</p><p>SEVERE: No Store configured, persistence disabled</p><p>Oct 9, 2012 10:15:14 AM org.apache.catalina.startup.HostConfig deployDescriptor</p><p>WARNING: A docBase D:\Spago\SpagoBI-DEMO-3.5.1\webapps\SpagoBIWekaEngine inside the host appBase has been specified, and will be ignored</p><p>Oct 9, 2012 10:15:14 AM org.apache.catalina.session.PersistentManagerBase start</p><p>SEVERE: No Store configured, persistence disabled</p><p>Oct 9, 2012 10:15:15 AM org.apache.coyote.http11.Http11Protocol start</p><p>INFO: Starting Coyote HTTP/1.1 on http-12345</p><p>Oct 9, 2012 10:15:15 AM org.apache.jk.common.ChannelSocket init</p><p>INFO: JK: ajp13 listening on /0.0.0.0:8009</p><p>Oct 9, 2012 10:15:15 AM org.apache.jk.server.JkMain start</p><p>INFO: Jk running ID=0 time=0/39 config=null</p><p>Oct 9, 2012 10:15:15 AM org.apache.catalina.startup.Catalina start</p><p>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)</p><p> at it.eng.spagobi.kpi.model.service.ManageModelInstancesAction.doService</p><p>(ManageModelInstancesAction.java:188)</p><p> at it.eng.spagobi.commons.services.AbstractSpagoBIAction.service(Abstrac tSpagoBIAction.java:68)</p><p> at it.eng.spago.dispatching.action.ActionCoordinator.invokeServiceBusine ss(ActionCoordinator.java:209)</p><p> at it.eng.spago.dispatching.action.ActionCoordinator.service(ActionCoord inator.java:158)</p><p> at it.eng.spago.dispatching.httpchannel.AdapterHTTP.service(AdapterHTTP. java:418)</p><p> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)</p><p> at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl icationFilterChain.java:290)</p><p> at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF ilterChain.java:206)</p><p> at it.eng.spagobi.commons.filters.ProfileFilter.doFilter(ProfileFilter.j ava:109)</p><p> at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl icationFilterChain.java:235)</p><p> at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF ilterChain.java:206)</p><p> at it.eng.spagobi.commons.filters.SpagoBICoreCheckSessionFilter.doFilter</p><p>(SpagoBICoreCheckSessionFilter.java:80) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl icationFilterChain.java:235)</p><p> at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF ilterChain.java:206)</p><p> at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV alve.java:233)</p><p> at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV alve.java:191)</p><p> at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j ava:128)</p><p> at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j ava:102)</p><p> at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal ve.java:109)</p><p> at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav a:286)</p><p> at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java</p><p>:845)</p><p> at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce ss(Http11Protocol.java:583)</p><p> at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:44</p><p>7)</p><p> 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</p><p> at it.eng.spagobi.kpi.model.service.ManageModelInstancesAction.doService</p><p>(ManageModelInstancesAction.java:224)</p><p> at it.eng.spagobi.commons.services.AbstractSpagoBIAction.service(Abstrac tSpagoBIAction.java:68)</p><p> at it.eng.spago.dispatching.action.ActionCoordinator.invokeServiceBusine ss(ActionCoordinator.java:209)</p><p> at it.eng.spago.dispatching.action.ActionCoordinator.service(ActionCoord inator.java:158)</p><p> at it.eng.spago.dispatching.httpchannel.AdapterHTTP.service(AdapterHTTP. java:418)</p><p> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)</p><p> at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl icationFilterChain.java:290)</p><p> at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF ilterChain.java:206)</p><p> at it.eng.spagobi.commons.filters.ProfileFilter.doFilter(ProfileFilter.j ava:109)</p><p> at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl icationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF ilterChain.java:206)</p><p> at it.eng.spagobi.commons.filters.SpagoBICoreCheckSessionFilter.doFilter</p><p>(SpagoBICoreCheckSessionFilter.java:80)</p><p> at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl icationFilterChain.java:235)</p><p> at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF ilterChain.java:206)</p><p> at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV alve.java:233)</p><p> at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV alve.java:191)</p><p> at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j ava:128)</p><p> at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j ava:102)</p><p> at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal ve.java:109)</p><p> at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav a:286)</p><p> at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java</p><p>:845)</p><p> at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce ss(Http11Protocol.java:583)</p><p> at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:44 7)</p><p> at java.lang.Thread.run(Thread.java:619)</p><p>Caused by: java.lang.NullPointerException</p><p> at it.eng.spagobi.kpi.model.service.ManageModelInstancesAction.deseriali zeJSONArray(ManageModelInstancesAction.java:872)</p><p> at it.eng.spagobi.kpi.model.service.ManageModelInstancesAction.doService</p><p>(ManageModelInstancesAction.java:188)</p><p>... 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</p><p> at it.eng.spagobi.commons.utilities.SpagoBIServiceExceptionHandler.getWr appedException(SpagoBIServiceExceptionHandler.java:86)</p><p> at it.eng.spagobi.commons.services.AbstractSpagoBIAction.handleException</p><p>(AbstractSpagoBIAction.java:163)</p><p> at it.eng.spagobi.commons.services.AbstractSpagoBIAction.service(Abstrac tSpagoBIAction.java:70)</p><p> at it.eng.spago.dispatching.action.ActionCoordinator.invokeServiceBusine ss(ActionCoordinator.java:209)</p><p> at it.eng.spago.dispatching.action.ActionCoordinator.service(ActionCoord inator.java:158)</p><p> at it.eng.spago.dispatching.httpchannel.AdapterHTTP.service(AdapterHTTP. java:418)</p><p> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl icationFilterChain.java:290)</p><p> at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF ilterChain.java:206)</p><p> at it.eng.spagobi.commons.filters.ProfileFilter.doFilter(ProfileFilter.j ava:109)</p><p> at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl icationFilterChain.java:235)</p><p> at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF ilterChain.java:206)</p><p> at it.eng.spagobi.commons.filters.SpagoBICoreCheckSessionFilter.doFilter</p><p>(SpagoBICoreCheckSessionFilter.java:80)</p><p> at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl icationFilterChain.java:235)</p><p> at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF ilterChain.java:206)</p><p> at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV alve.java:233)</p><p> at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV alve.java:191)</p><p> at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j ava:128)</p><p> at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j ava:102)</p><p> at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal ve.java:109)</p><p> at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav a:286)</p><p> at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java</p><p>:845)</p><p> at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce ss(Http11Protocol.java:583)</p><p> at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:44</p><p>7)</p><p> at java.lang.Thread.run(Thread.java:619)</p><p>Caused by: it.eng.spagobi.utilities.exceptions.SpagoBIServiceException: Exceptio n saving model instance nodes</p><p> at it.eng.spagobi.kpi.model.service.ManageModelInstancesAction.doService</p><p>(ManageModelInstancesAction.java:224)</p><p> at it.eng.spagobi.commons.services.AbstractSpagoBIAction.service(Abstrac tSpagoBIAction.java:68)</p><p>... 22 more</p><p>Caused by: java.lang.NullPointerException</p><p> at it.eng.spagobi.kpi.model.service.ManageModelInstancesAction.deseriali zeJSONArray(ManageModelInstancesAction.java:872)</p><p> at it.eng.spagobi.kpi.model.service.ManageModelInstancesAction.doService</p><p>(ManageModelInstancesAction.java:188)</p><p>... 23 more</p>