bos开发了一个单据，直接新增保存正常，新增选单保存时抱错
Received an invalid column length from the bcp client for colid 39.
详细信息如下：
[{"operation":"Dev_PUR_ReceiveBill.MBIClick.tbSplitSave"}]
发生时间：18:31:13
错误来源： .Net SqlClient Data Provider
错误信息：Received an invalid column length from the bcp client for colid 39.
===================================================
调用堆栈：
Server stack trace:
at Kingdee.BOS.Orm.Drivers.SqlServerBulkCopyTask.Execute(IDbConnection con, IDbTransaction tran)
at Kingdee.BOS.App.Data.Sql.KSqlServerBulkCopyTask.Execute(IDbConnection con, IDbTransaction tran)
at Kingdee.BOS.Orm.Drivers.OrmTransactionBase.ExecuteSqlTasks(IList`1 tasks)
at Kingdee.BOS.App.Core.Save.ExecuteOperatinTransaction(DynamicObject[] objs)
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.AbstractDynamicWebFormView.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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