由销售订单下推发货通知单，保存时报错。
如果新增一张发货通知单，则无异常。
求解决……
Specified cast is not valid.
[{"operation":"SAL_DELIVERYNOTICE.MBIClick.tbSplitSave"}]
发生时间：22:29:54
错误来源： Kingdee.BOS.ServiceHelper
错误信息：Specified cast is not valid.
===================================================
调用堆栈：
Server stack trace:
at Kingdee.BOS.Core.Metadata.Util.ConditionParser.VerifyExpression(VerifyExpressionParameter parameter)
at Kingdee.BOS.App.Core.BusinessFlow.BusinessFlowWriteBack.FillWriteBackRowWithOutSourceAmount(IDynamicFormModel model, Row`1 articulationRow, WRule`1 writebackrow, List`1 rowFirstNodes)
at Kingdee.BOS.App.Core.BusinessFlow.BusinessFlowWriteBack.FillArticulationRowWriteBackRows(IDynamicFormModel model, Row`1 articulationRow, Dictionary`2 routeTrees)
at Kingdee.BOS.App.Core.BusinessFlow.BusinessFlowWriteBack.FillSheetWriteBackRows(IDynamicFormModel model, Sheets`1 sheets, Dictionary`2 routeTrees)
at Kingdee.BOS.App.Core.BusinessFlow.BusinessFlowWriteBack.DoWriteBack(Sheets`1 sheets, AED`1 aed)
at Kingdee.BOS.App.Core.BusinessFlow.BusinessFlowTracker`1.WriteDataToDB(BusinessFlowInstanceCollection newInstances, BusinessFlowTrackerCollection trackerRows, Sheets`1 sheets, Sheets`1 snapshot, AED`1 aed)
at Kingdee.BOS.App.Core.BusinessFlow.BusinessFlowTracker`1.Save(Sheets`1 sheets)
at Kingdee.BOS.App.Core.BusinessFlow.BusinessFlowTrackerApply.Save(DynamicObject[] dataObjects, String operationNumber)
at Kingdee.BOS.App.Core.Save.SaveConvertData(DynamicObject[] dataObject)
at Kingdee.BOS.App.Core.AbstractOprerationService.CallOperation(DynamicObject[]& objs)
at Kingdee.BOS.App.Core.AbstractOprerationService.CallOperatinTransaction(DynamicObject[] objs)
at Kingdee.BOS.App.Core.AbstractOprerationService.DoExcete()
at Kingdee.BOS.App.Core.AbstractOprerationService.Excute(DynamicObject[] dataEntities)
at Kingdee.BOS.App.Core.SaveService.Save(Context ctx, BusinessInfo info, DynamicObject[] dataEntities, OperateOption option, String operationNumber)
Exception rethrown at [0]:
at Kingdee.BOS.ServiceHelper.BusinessDataServiceHelper.Save(Context ctx, BusinessInfo businessInfo, DynamicObject dataObject, OperateOption option, String operationNumber)
at Kingdee.BOS.Model.Bill.BillModel.Save(OperateOption option)
at Kingdee.BOS.Business.Bill.Operation.Save.ExecuteBillOperation(OperateOption option)
at Kingdee.BOS.Core.DynamicForm.AbstractDynamicFormOperation.Operation(CallBackWfAfterOperation callbackwf, IOperationResult result)
at Kingdee.BOS.Core.DynamicForm.AbstractDynamicFormOperation.Execute(InvokeFormOperation4WfParam param, CallBackWfAfterOperation callbackwf)
at Kingdee.BOS.Web.DynamicForm.OperationCaller.InvokeFormOperation(String operationNumber)
at Kingdee.BOS.Business.DynamicForm.BusinessService.ExcuteOperation.DoAction(FormBusinessServiceArgs e)
at Kingdee.BOS.Core.DynamicForm.FormBusinessServiceUtil.InvokeServices(IDynamicFormView view, Object source, IEnumerable`1 services, Int32 actionType, String activeEntity, DynamicObject activeRow, Int32 rowIndex)
at Kingdee.BOS.Web.DynamicForm.BusinessServiceCaller.InvokeFormBusiness(IDynamicFormView view, Object source, List`1 formBusinessServices, Int32 actionType, String entityKey, Int32 row)
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
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