Hyland Connect

ggoutham · ‎03-20-2013

Hi Community,

I am using alfresco community 4.2.c. I want to install activiti explorer in alfresco.
For that i have placed the activiti-explorer war file into alfresco/tomcat/webapps folder.
For the first time i have not changed any database files in activiti configuration, the activiti explorer started and showed the login page,
But when i give login credentials showing a login error (obvious because not configured database)

Then i have changed the db.properties file in activiti-explorer with these values
db=postgresql
jdbc.driver=org.postgresql.Driver
jdbc.url=jdbc

ostgresql://localhost:5432/alfresco
jdbc.username=alfresco
jdbc.password=admin

When i am starting alfresco it is showing show many errors in log and activiti-explorer is not starting up..

Can anybody please tell me anything iam missing here and is it correct to do like this.

Pleaase help me,,

Regards,
Goutham

eihab86 · ‎03-23-2013

I think that by default the Activiti Explorer application runs with an in-memory h2 database and with example processes, users and groups. So you should be able to login even if you didn't configure Activiti to connect to a database.

Alfresco has Activiti workflow engine already embed, and when Alfresco database is created first time Activiti tables also will be created(you can check them their names starts with 'act_'). So you should disable the Activiti demo setup to prevent it from inserting example processes, users and groups.

Anyway you should get some helpful information about your error from your log file.

ggoutham · ‎03-25-2013

Hi,
That's ok. But i want to point my activiti explorer to the alfresco database(postgresql). So that i can have the alfresco users and groups and alfresco workflows. For this thing you have any idea. And using these activiti explorer i want to deploy workflows to alfresco. So that i can use
them in alfresco share and explorer.
If you have any idea regarding this Please share me..

Regards
Goutham

vrothenberg · ‎06-28-2013

I would also be interested in Activiti + Alfresco integration.

If anyone knows how to do this I'd greatly appreciate it!

hedi_ad · ‎09-13-2013

same problem, anyone have a solution?

bimki · ‎11-26-2013

I'm also fighting with this problem, but at this moment i can't login into explorer, I'm receiving:

java.lang.NullPointerException
at org.activiti.explorer.ui.login.DefaultLoginHandler.authenticate(DefaultLoginHandler.java:41)

in activiti context XMls I've marked not to generate sample data:


   <property name="processEngine" ref="processEngine" />
   <property name="createDemoUsersAndGroups" value="false" />
        <property name="createDemoProcessDefinitions" value="false" />
        <property name="createDemoModels" value="false" />
‍‍‍‍‍‍

Does anybody have any idea why I cant login?
configuration in db.properties looks like this:

db=postgres
jdbc.driver=org.postgresql.Driver
jdbc.url=jdbc

ostgresql://localhost:5432/alfresco
jdbc.username=alfresco
jdbc.password=*******

dcambier · ‎11-27-2013

I follow steps here and it work for me :
http://forums.activiti.org/content/activiti-explorer-512-alfresco-community

Before login to explorer, you need to add an admin user in act_id_user. I don't know yet how to link alfresco users to activiti explorer.

dimmumeister · ‎04-27-2014

how did you add an admin user in act_id_user ? I did the insert statements :
insert into ACT_ID_GROUP values ('admin', 1, 'System administrator', 'security-role');
insert into ACT_ID_USER values ('admin', 1, 'admin', 'admin', 'admin@localhost', 'admin', '');
insert into ACT_ID_MEMBERSHIP values ('admin', 'admin');
but still could not log into the activiti explorer

dimmumeister · ‎04-27-2014

well, I made it! I could log into activiti explorer!
but when I try to access the Procees > My instances tab I got the following error:
Apr 27, 2014 7:13:47 PM org.restlet.engine.log.LogFilter afterHandle
INFO: 2014-04-27   19:13:47   127.0.0.1   -   127.0.0.1   8080   GET   /activiti-explorer/service/process-instance/1655/highlights   callback=jQuery17103329401656811617_1398622427313&_=1398622427629   200   175   0   15   http://localhost:8080   Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:26.0) Gecko/20100101 Firefox/26.0   http://localhost:8080/activiti-explorer/diagram-viewer/index.html?processDefinitionId=simpleApproval...
07:14:16,816 [http-bio-8080-exec-22] WARN org.activiti.engine.impl.bpmn.behavior.ScriptTaskActivityBehavior - Exception while executing generateDataset : problem evaluating script: ReferenceError: "importPackage" is not defined in <eval> at line number 3
Apr 27, 2014 7:14:16 PM com.vaadin.Application terminalError
SEVERE: Terminal error:
com.vaadin.event.ListenerMethod$MethodException: Invocation of method buttonClick in org.activiti.explorer.ui.form.FormPropertiesForm$1 failed.
   at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:530)
   at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164)
   at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1219)
   at com.vaadin.ui.Button.fireClick(Button.java:567)
   at com.vaadin.ui.Button.changeVariables(Button.java:223)
   at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.changeVariables(AbstractCommunicationManager.java:1460)
   at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariableBurst(AbstractCommunicationManager.java:1404)
   at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1329)
   at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleUidlRequest(AbstractCommunicationManager.java:761)
   at com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest(CommunicationManager.java:325)
   at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:501)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
   at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
   at org.activiti.explorer.filter.ExplorerFilter.doFilter(ExplorerFilter.java:44)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
   at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
   at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
   at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
   at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
   at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:315)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
   at java.lang.Thread.run(Thread.java:744)
Caused by: com.vaadin.event.ListenerMethod$MethodException: Invocation of method componentEvent in org.activiti.explorer.ui.reports.ReportDetailPanel$2 failed.
   at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:530)
   at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164)
   at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1219)
   at org.activiti.explorer.ui.form.FormPropertiesForm.access$000(FormPropertiesForm.java:45)
   at org.activiti.explorer.ui.form.FormPropertiesForm$1.buttonClick(FormPropertiesForm.java:139)
   at sun.reflect.GeneratedMethodAccessor1229.invoke(Unknown Source)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:483)
   at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)
   … 33 more
Caused by: org.activiti.engine.ActivitiException: problem evaluating script: ReferenceError: "importPackage" is not defined in <eval> at line number 3
   at org.activiti.engine.impl.scripting.ScriptingEngines.evaluate(ScriptingEngines.java:77)
   at org.activiti.engine.impl.scripting.ScriptingEngines.evaluate(ScriptingEngines.java:64)
   at org.activiti.engine.impl.bpmn.behavior.ScriptTaskActivityBehavior.execute(ScriptTaskActivityBehavior.java:63)
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperationActivityExecute.java:44)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:87)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:532)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:527)
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerStart.eventNotificationsCompleted(AtomicOperationTransitionNotifyListenerStart.java:52)
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:87)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:532)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:527)
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:49)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:87)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:532)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:527)
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionCreateScope.execute(AtomicOperationTransitionCreateScope.java:49)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:87)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:532)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:527)
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerTake.execute(AtomicOperationTransitionNotifyListenerTake.java:66)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:87)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:532)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:527)
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionDestroyScope.execute(AtomicOperationTransitionDestroyScope.java:116)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:87)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:532)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:527)
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerEnd.eventNotificationsCompleted(AtomicOperationTransitionNotifyListenerEnd.java:36)
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:87)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:532)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:527)
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:49)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:87)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:532)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:527)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.take(ExecutionEntity.java:367)
   at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performOutgoingBehavior(BpmnActivityBehavior.java:105)
   at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performDefaultOutgoingBehavior(BpmnActivityBehavior.java:54)
   at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.leave(FlowNodeActivityBehavior.java:44)
   at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.execute(FlowNodeActivityBehavior.java:36)
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperationActivityExecute.java:44)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:87)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:532)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:527)
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationProcessStartInitial.eventNotificationsCompleted(AtomicOperationProcessStartInitial.java:46)
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:87)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:532)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:527)
   at org.activiti.engine.impl.pvm.runtime.AtomicOperationProcessStart.eventNotificationsCompleted(AtomicOperationProcessStart.java:45)
   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56)
   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:87)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:532)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:527)
   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.start(ExecutionEntity.java:322)
   at org.activiti.engine.impl.cmd.SubmitStartFormCmd.execute(SubmitStartFormCmd.java:57)
   at org.activiti.engine.impl.cmd.SubmitStartFormCmd.execute(SubmitStartFormCmd.java:30)
   at org.activiti.engine.impl.cmd.NeedsActiveProcessDefinitionCmd.execute(NeedsActiveProcessDefinitionCmd.java:53)
   at org.activiti.engine.impl.interceptor.CommandExecutorImpl.execute(CommandExecutorImpl.java:24)
   at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:61)
   at org.activiti.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInterceptor.java:42)
   at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:130)
   at org.activiti.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:40)
   at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:31)
   at org.activiti.engine.impl.FormServiceImpl.submitStartFormData(FormServiceImpl.java:62)
   at org.activiti.explorer.ui.reports.ReportDetailPanel.startProcessInstanceWithFormProperties(ReportDetailPanel.java:183)
   at org.activiti.explorer.ui.reports.ReportDetailPanel$2.handleFormSubmit(ReportDetailPanel.java:164)
   at org.activiti.explorer.ui.form.FormPropertiesEventListener.componentEvent(FormPropertiesEventListener.java:39)
   at sun.reflect.GeneratedMethodAccessor1255.invoke(Unknown Source)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:483)
   at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)
   … 41 more
Caused by: javax.script.ScriptException: ReferenceError: "importPackage" is not defined in <eval> at line number 3
   at jdk.nashorn.api.scripting.NashornScriptEngine.throwAsScriptException(NashornScriptEngine.java:564)
   at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:548)
   at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:528)
   at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:524)
   at jdk.nashorn.api.scripting.NashornScriptEngine.eval(NashornScriptEngine.java:194)
   at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:233)
   at org.activiti.engine.impl.scripting.ScriptingEngines.evaluate(ScriptingEngines.java:75)
   … 114 more
Caused by: <eval>:3 ReferenceError: "importPackage" is not defined
   at jdk.nashorn.internal.runtime.ECMAErrors.error(ECMAErrors.java:56)
   at jdk.nashorn.internal.runtime.ECMAErrors.referenceError(ECMAErrors.java:318)
   at jdk.nashorn.internal.runtime.ECMAErrors.referenceError(ECMAErrors.java:290)
   at jdk.nashorn.api.scripting.NashornScriptEngine.__noSuchProperty__(NashornScriptEngine.java:274)
   at jdk.nashorn.internal.scripts.Script$engine._L35(nashorn:engine/resources/engine.js:37)
   at jdk.nashorn.internal.scripts.Script$\^eval\_.runScript(<eval>:3)
   at jdk.nashorn.internal.runtime.ScriptFunctionData.invoke(ScriptFunctionData.java:498)
   at jdk.nashorn.internal.runtime.ScriptFunction.invoke(ScriptFunction.java:206)
   at jdk.nashorn.internal.runtime.ScriptRuntime.apply(ScriptRuntime.java:378)
   at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:546)
   … 119 more
Any idea?

rima · ‎02-10-2016

I am trying to integrate activiti-modeler with a custom web app. I am facing a similar issue. How did you resolve it.

Stacktrace:
com.vaadin.Application terminalError
SEVERE: Terminal error:
com.vaadin.event.ListenerMethod$MethodException: Invocation of method buttonClick in org.activiti.explorer.ui.mainlayout.MainMenuBar$ShowProcessDefinitionsClickListener failed.
   at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:530)
   at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164)
   at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1219)
   at com.vaadin.ui.Button.fireClick(Button.java:567)
   at com.vaadin.ui.Button.changeVariables(Button.java:223)
   at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.changeVariables(AbstractCommunicationManager.java:1460)
   at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariableBurst(AbstractCommunicationManager.java:1404)
   at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1329)
   at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleUidlRequest(AbstractCommunicationManager.java:761)
   at com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest(CommunicationManager.java:325)
   at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:501)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
   at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
   at org.activiti.explorer.filter.ExplorerFilter.doFilter(ExplorerFilter.java:53)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
   at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
   at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
   at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
   at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
   at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2430)
   at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2419)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
   at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
   at org.activiti.explorer.ui.mainlayout.MainMenuBar.setMainNavigation(MainMenuBar.java:68)
   at org.activiti.explorer.ui.mainlayout.MainLayout.setMainNavigation(MainLayout.java:67)
   at org.activiti.explorer.ui.MainWindow.setMainNavigation(MainWindow.java:83)
   at org.activiti.explorer.DefaultViewManager.switchView(DefaultViewManager.java:346)
   at org.activiti.explorer.DefaultViewManager.showDeployedProcessDefinitionPage(DefaultViewManager.java:207)
   at org.activiti.explorer.ui.mainlayout.MainMenuBar$ShowProcessDefinitionsClickListener.buttonClick(MainMenuBar.java:201)
   at sun.reflect.GeneratedMethodAccessor160.invoke(Unknown Source)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
   at java.lang.reflect.Method.invoke(Unknown Source)
   at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)
   … 34 more