流程启动报错

z2140640

一个标准流程，起始环节为mainActivity。
现在在mainActivity.w中定义了一个windowFrame，然后调用： justep.xbl("windowFrame1").callURL(url);目的是为了，根据不同的信息跳转到不同的url填数据。
跳转过去的页面，加载、填单都没有问题。但是一点保存就报错：

com.justep.model.exception.ModelException: java.lang.reflect.InvocationTargetException
at com.justep.system.action.Engine.invokeActions(Unknown Source)
at com.justep.business.server.BusinessServer.doAction(Unknown Source)
at com.justep.business.server.BusinessServer.doExcute(Unknown Source)
at com.justep.business.server.BusinessServer.excute(Unknown Source)
at com.justep.business.server.BusinessServerServlet.execService(Unknown Source)
at com.justep.business.server.BusinessServerServlet.service(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at com.justep.x.bs.BusinessServerServlet.service(Unknown Source)
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:857)
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:595)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:592)
at com.justep.system.action.Engine.invokeActions(Native Method)
... 21 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:592)
at com.justep.system.action.Engine.invokeAction(Native Method)
at com.justep.system.action.Engine.invokeAction(Unknown Source)
at com.justep.model.impl.UtilImplementInstance.invokeAction(Unknown Source)
at com.justep.model.impl.UtilImplementInstance.invokeAction(Unknown Source)
at com.justep.system.action.ActionUtils.invokeAction(Unknown Source)
at com.justep.system.process.ProcessUtils.startProcess(Unknown Source)
at ExternalProcessProcedure.startProcess(ExternalProcessProcedure.java:16)
... 26 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:592)
at com.justep.system.action.Engine.invokeAction(Native Method)
at com.justep.system.action.Engine.invokeAction(Unknown Source)
at com.justep.model.impl.UtilImplementInstance.invokeAction(Unknown Source)
at com.justep.model.impl.UtilImplementInstance.invokeAction(Unknown Source)
at com.justep.system.action.ActionUtils.invokeAction(Unknown Source)
at ProcessProcedure.beforeStartProcess(ProcessProcedure.java:120)
... 37 more
Caused by: java.lang.NullPointerException
at com.justep.system.process.ProcessQueryEngine.makeTo(Unknown Source)
at com.justep.system.process.StartProcessQueryEngine.execute(Unknown Source)
at com.justep.system.process.ProcessEngine.startQuery(Unknown Source)
at ProcessProcedure.startProcessQuery(ProcessProcedure.java:81)
... 47 more

求解为什么？

z2140640

结贴，不知道为什么，我把流程重画一遍就好了