委外订单保存时错误，提示如下： 请帮忙解决
Value cannot be null.
Parameter name: source
简要信息：
发生时间：08:45:07
错误来源： Kingdee.BOS.ServiceHelper
错误信息：Value cannot be null.
Parameter name: source
===================================================
调用堆栈：
Server stack trace:
at System.Linq.Enumerable.First[TSource](IEnumerable`1 source)
at Kingdee.K3.MFG.SUB.App.Core.SUBBizState.MemConfirmAction.MemUpdatePPBomEntityAction.SysSimpleFields(PPBomEntry ppBomEntityView, TreeEntity moEntityView)
at Kingdee.K3.MFG.SUB.App.Core.SUBBizState.MemConfirmAction.MemUpdatePPBomEntityAction.SynsMoToPPBOMEntry(PPBomEntry ppBomEntityView, TreeEntity subReqEntityView, SubReqBillView subReqDataView)
at Kingdee.K3.MFG.SUB.App.Core.SUBBizState.MemConfirmAction.MemUpdatePPBomEntityAction.SetValue(Dictionary`2 dicMoEntryMapPpBom)
at Kingdee.K3.MFG.SUB.App.Core.SubReqOrderService.SynsMoBomExpandToPPBOM(Context ctx, List`1 lstMoEntryDatas, Dictionary`2 dicMoentryId, FormMetadata ppbomMetaData, Boolean IsRet)
at Kingdee.K3.MFG.SUB.App.Core.SubReqOrderService.SynsBomToPPBOM(Context ctx, List`1 lstMoEntryDatas, Dictionary`2 dicMoentryId)
at Kingdee.K3.MFG.SUB.App.ServicePlugIn.ReqOrder.Save.BeginOperationTransaction(BeginOperationTransactionArgs e)
at Kingdee.BOS.App.Core.PlugInProxy.OperationServicePlugInProxy.FireBeginOperationTransaction(BeginOperationTransactionArgs e)
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