反审核期初应付单时提示字符串出错！！

客户在反审核期初应付单时，提示：startIndex 不能大于字符串长度，参数名: startIndex 请问这是什么原因？？

[{"operation":"AP_Payable_List.MBIClick.tbReject"}]
发生时间：12:17:00
错误来源： Kingdee.BOS.ServiceHelper
错误信息：startIndex 不能大于字符串长度。
参数名: startIndex
===================================================
调用堆栈：
Server stack trace:
在 System.String.InternalSubStringWithChecks(Int32 startIndex, Int32 length, Boolean fAlwaysCopy)
在 System.String.Substring(Int32 startIndex)
在 Kingdee.K3.FIN.HS.App.Core.HookService.GetHookIDs(Context ctx, IEnumerable`1 dyHook, String& retMsg, String& hookIDs, Boolean bForDeleteAdjPayBill)
在 Kingdee.K3.FIN.HS.App.Core.HookService.UnHookInvoiceForAP(Context ctx, IEnumerable`1 dyHook, Boolean bForDeleteAdjPayBill)
在 Kingdee.K3.FIN.AP.App.ServicePlugIn.PayableBill.ServiceUnAuditPlugIn.BeginOperationTransaction(BeginOperationTransactionArgs e)
在 Kingdee.BOS.App.Core.PlugInProxy.OperationServicePlugInProxy.FireBeginOperationTransaction(BeginOperationTransactionArgs e)
在 Kingdee.BOS.App.Core.AbstractOprerationService.CallOperation(DynamicObject[]& objs)
在 Kingdee.BOS.App.Core.AbstractOprerationService.CallOperatinTransaction(DynamicObject[] objs)
在 Kingdee.BOS.App.Core.AbstractOprerationService.DoExcete()
在 Kingdee.BOS.App.Core.AbstractOprerationService.Excute(Object[] ids)
在 Kingdee.BOS.App.Core.SetStatusService.SetBillStatus(Context ctx, BusinessInfo businessInfo, List`1 pkEntryIds, List`1 paras, String operationNumber, OperateOption option)
Exception rethrown at [0]:
在 Kingdee.BOS.ServiceHelper.BusinessDataServiceHelper.SetBillStatus(Context ctx, BusinessInfo businessInfo, List`1 pkEntryIds, List`1 paras, String operationNumber, OperateOption option)
在 Kingdee.BOS.Business.Bill.Operation.AbstractStatusConvert.BatStatusConvert(Int32 loopTimes, Int32 iBat, Object[] ids, List`1 paras)
在 Kingdee.BOS.Business.Bill.Operation.AbstractStatusConvert.ExecuteStatusConvert(List`1 paras)
在 Kingdee.BOS.Business.Bill.Operation.UnAudit.UnAuditIdeaPrompt()
在 Kingdee.BOS.Business.Bill.Operation.UnAudit.ExecuteOperation()
在 Kingdee.BOS.Core.DynamicForm.AbstractDynamicFormOperation.Operation(CallBackWfAfterOperation callbackwf, IOperationResult result)
在 Kingdee.BOS.Core.DynamicForm.AbstractDynamicFormOperation.Execute(InvokeFormOperation4WfParam param, CallBackWfAfterOperation callbackwf)
在 Kingdee.BOS.Web.DynamicForm.AbstractDynamicWebFormView.InvokeFormOperation(String operationNumber)
在 Kingdee.BOS.Business.DynamicForm.BusinessService.ExcuteOperation.DoAction(FormBusinessServiceArgs e)
在 Kingdee.BOS.Core.DynamicForm.FormBusinessServiceUtil.InvokeServices(IDynamicFormView view, Object source, IEnumerable`1 services, Int32 actionType, String activeEntity, DynamicObject activeRow, Int32 rowIndex)
在 Kingdee.BOS.Web.DynamicForm.BusinessServiceCaller.InvokeFormBusiness(IDynamicFormView view, Object source, List`1 formBusinessServices, Int32 actionType, String entityKey, Int32 row)
在 Kingdee.BOS.Web.DynamicForm.DynamicWebFormView.BarItemClick(String parentKey, String barItemKey, BarDataManager bar, Int32 bartype)
在 Kingdee.BOS.Web.List.ListView.MainBarItemClick(String barItemKey)
在 Kingdee.BOS.Web.DynamicForm.DynamicWebFormController.MainBarItemClick(String itemKey, JSONArray postDatas)
错误数据： System.Collections.ListDictionaryInternal