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Exeption  Process  start

Question asked by florent1 on May 3, 2012
Latest reply on May 3, 2012 by ronald.van.kuijk
Hi
i have a following Error when my Process start
any Suggestion?
thx

Exception
com.vaadin.event.ListenerMethod$MethodExceptionCause: org.activiti.engine.ActivitiException: Unknown property used in expression   at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)   at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164)   at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1193)   at com.vaadin.ui.Button.fireClick(Button.java:539)   at com.vaadin.ui.Button.changeVariables(Button.java:206)   at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariableBurst(AbstractCommunicationManager.java:1299)   at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1219)   at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleUidlRequest(AbstractCommunicationManager.java:735)   at com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest(CommunicationManager.java:296)   at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:501)   at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)   at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)   at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)   at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)   at java.lang.Thread.run(Thread.java:722)Caused by: org.activiti.engine.ActivitiException: Unknown property used in expression   at org.activiti.engine.impl.el.JuelExpression.getValue(JuelExpression.java:55)   at org.activiti.engine.impl.bpmn.behavior.UserTaskActivityBehavior.handleAssignments(UserTaskActivityBehavior.java:98)   at org.activiti.engine.impl.bpmn.behavior.UserTaskActivityBehavior.execute(UserTaskActivityBehavior.java:85)   at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperationActivityExecute.java:44)   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:77)   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:530)   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:525)   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:77)   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:530)   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:525)   at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:49)   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:77)   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:530)   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:525)   at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionCreateScope.execute(AtomicOperationTransitionCreateScope.java:49)   at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:77)

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