I'm new to Activiti so if I'm posting this question in the wrong place, please let me know.
I am trying to create a flow using the Modeler on a Windows 7 X64 system using Activiti 5.14.
The flow is a simple test one with a couple of steps and a boundary timer event trying to model a simple escalation flow.
What I found is that if I create the flow with a boundary timer event but don't have that event connected to anything I can save and then export the flow without error. If, however, I connect the timer event to a user task, save the flow and then try to export the flow in Explorer I get the following Null Pointer exception.
I'm not sure what I'm doing wrong here or what I'm not understanding but was hoping to get some guidance.
<blockcode> INFO: 2013-11-17 09:57:07 0:0:0:0:0:0:0:1 - 0:0:0:0:0:0:0:1 8080 PUT /activiti-explorer/service/model/10973/save _dc=1384711024305 200 0 93741 3030 http://localhost:8080 Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTM L, like Gecko) Chrome/31.0.1650.57 Safari/537.36 http://localhost:8080/activiti-explorer/service/editor?id=10973 09:57:14,685 [http-bio-8080-exec-6] ERROR org.activiti.editor.ui.EditorProcessDefinitionDetailPanel - failed to export model to BPMN XML java.lang.NullPointerException at org.activiti.editor.language.json.converter.BpmnJsonConverter.retrieveAttachedRefObject(BpmnJsonConverter.java:487) at org.activiti.editor.language.json.converter.BpmnJsonConverter.postProcessElements(BpmnJsonConverter.java:470) at org.activiti.editor.language.json.converter.BpmnJsonConverter.convertToBpmnModel(BpmnJsonConverter.java:373) at org.activiti.editor.ui.EditorProcessDefinitionDetailPanel$2.getStream(EditorProcessDefinitionDetailPanel.java:250) at com.vaadin.Application.handleURI(Application.java:798) at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleURI(AbstractCommunicationManager.java:2289) at com.vaadin.terminal.gwt.server.CommunicationManager.handleURI(CommunicationManager.java:377) at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.handleURI(AbstractApplicationServlet.java:1099) at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:535) 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:44) 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.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:744) </blockcode>
