【已处理】自定义添加的单据，工作流审核时Object reference ...

1、自定义添加的单据，工作流审核时提示Object reference not set to an instance of an object.
不使用工作流审核，就没问题

发生时间：14:57:41
错误来源： Kingdee.BOS.Web
错误信息：Object reference not set to an instance of an object.
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调用堆栈：
at Kingdee.BOS.Web.Bill.BillView.billModel_AfterSave(Object sender, AfterSaveEventArgs e)
at Kingdee.BOS.Model.Bill.BillModel.Save(OperateOption option)
at Kingdee.BOS.ApprovalFlow.PlugIns.ApprovalAssignmet.ApprovalAssignDeal.SubmitValidate(OperateOption option)
at Kingdee.BOS.Workflow.PlugIns.AssignApprovalBaseEdit.Submit(OperateOption option)
at Kingdee.BOS.ApprovalFlow.PlugIns.ApprovalAssignmet.ApprovalAssignDeal.BarItemClick(BarItemClickEventArgs e)
at Kingdee.BOS.Core.DynamicForm.PlugIn.DynamicFormViewPlugInProxy.FireBarItemClick(BarItemClickEventArgs e)
at Kingdee.BOS.Web.DynamicForm.DynamicWebFormView.BarItemClick(String parentKey, String barItemKey, BarDataManager bar, Int32 bartype)
at Kingdee.BOS.Web.DynamicForm.DynamicWebFormView.MainBarItemClick(String barItemKey)
at Kingdee.BOS.Web.DynamicForm.DynamicWebFormController.MainBarItemClick(String itemKey, JSONArray postDatas)
错误数据： System.Collections.ListDictionaryInternal