流程节点异常一直报这个错,也看不懂事什么意思,求帮助

java.lang.NullPointerException
 at OThinker.H3.SmartFlow.Activity.ParticipativeActivity.OnExecute(ParticipativeActivity.java:224)
 at OThinker.H3.SmartFlow.SmartActivity.ActivateActivity(SmartActivity.java:467)
 at OThinker.H3.SmartFlow.SmartActivity.DisposeMessage(SmartActivity.java:315)
 at OThinker.H3.SmartFlow.SmartWorkflow.DisposeMessage(SmartWorkflow.java:181)
 at OThinker.H3.Engine.Instance.MessageDisptacher.DispatchMessage(MessageDisptacher.java:168)
 at OThinker.H3.Engine.Instance.MessageDisptacher.OnWork(MessageDisptacher.java:83)
 at OThinker.H3.Entity.Engine.OnWorkDaemon(Engine.java:720)
 at OThinker.Common.Clusterware.LogicUnits.LogicUnit.OnSharedDaemon(LogicUnit.java:141)
 at OThinker.Common.Clusterware.Vessel.Vessel._OnSharedDaemon(Vessel.java:1880)
 at OThinker.Common.Clusterware.Vessel.FarmVessel.OnSharedDaemon(FarmVessel.java:2382)
 at OThinker.Common.Clusterware.Vessel.Vessel.RunSharedDaemon(Vessel.java:1814)
 at OThinker.Common.Threading.ThreadStart.run(ThreadStart.java:19)
2019-07-01 11:04:56 - [ERROR] - >> - OThinker.H3.SmartFlow.SmartActivity.HandleException(SmartActivity.java:394)
java.lang.NullPointerException
 at OThinker.H3.SmartFlow.Activity.ParticipativeActivity.OnExecute(ParticipativeActivity.java:224)
 at OThinker.H3.SmartFlow.SmartActivity.ActivateActivity(SmartActivity.java:467)
 at OThinker.H3.SmartFlow.SmartActivity.DisposeMessage(SmartActivity.java:315)
 at OThinker.H3.SmartFlow.SmartWorkflow.DisposeMessage(SmartWorkflow.java:181)
 at OThinker.H3.Engine.Instance.MessageDisptacher.DispatchMessage(MessageDisptacher.java:168)
 at OThinker.H3.Engine.Instance.MessageDisptacher.OnWork(MessageDisptacher.java:83)
 at OThinker.H3.Entity.Engine.OnWorkDaemon(Engine.java:720)
 at OThinker.Common.Clusterware.LogicUnits.LogicUnit.OnSharedDaemon(LogicUnit.java:141)
 at OThinker.Common.Clusterware.Vessel.Vessel._OnSharedDaemon(Vessel.java:1880)
 at OThinker.Common.Clusterware.Vessel.FarmVessel.OnSharedDaemon(FarmVessel.java:2382)
 at OThinker.Common.Clusterware.Vessel.Vessel.RunSharedDaemon(Vessel.java:1814)
 at OThinker.Common.Threading.ThreadStart.run(ThreadStart.java:19)
2019-07-01 11:04:56 - [ERROR] -  - OThinker.H3.SmartFlow.SmartActivity.DisposeMessage(SmartActivity.java:371)
java.lang.NullPointerException
 at OThinker.H3.SmartFlow.SmartActivity.HandleException(SmartActivity.java:401)
 at OThinker.H3.SmartFlow.SmartActivity.ActivateActivity(SmartActivity.java:472)
 at OThinker.H3.SmartFlow.SmartActivity.DisposeMessage(SmartActivity.java:315)
 at OThinker.H3.SmartFlow.SmartWorkflow.DisposeMessage(SmartWorkflow.java:181)
 at OThinker.H3.Engine.Instance.MessageDisptacher.DispatchMessage(MessageDisptacher.java:168)
 at OThinker.H3.Engine.Instance.MessageDisptacher.OnWork(MessageDisptacher.java:83)
 at OThinker.H3.Entity.Engine.OnWorkDaemon(Engine.java:720)
 at OThinker.Common.Clusterware.LogicUnits.LogicUnit.OnSharedDaemon(LogicUnit.java:141)
 at OThinker.Common.Clusterware.Vessel.Vessel._OnSharedDaemon(Vessel.java:1880)
 at OThinker.Common.Clusterware.Vessel.FarmVessel.OnSharedDaemon(FarmVessel.java:2382)
 at OThinker.Common.Clusterware.Vessel.Vessel.RunSharedDaemon(Vessel.java:1814)
 at OThinker.Common.Threading.ThreadStart.run(ThreadStart.java:19)