[jbpm-users] [jBPM Users] - Re: NullPointer Exception when starting a process whith Tomc

[hidman78]

  | java.lang.NullPointerException
  | 	at org.jbpm.pvm.internal.svc.ExecutionServiceImpl.startProcessInstanceByKey(ExecutionServiceImpl.ja
  | va:66)
  | 	at javaclass.DAO.BillDAO.findByExample(BillDAO.java:45)
  | 	at javaclass.action.ListBillAction.execute(ListBillAction.java:29)
  | 	at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)
  | 	at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)
  | 	at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
  | 	at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
  | 	at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:305)
  | 	at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
  | 	at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
  | 	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
  | 	at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
  | 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
  | 	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:128)
  | 	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:293)
  | 	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
  | 	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
  | 
  | 	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
  | 	at java.lang.Thread.run(Unknown Source)	
  | 

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