Di Error - Exception: -5001 - Object type for draft is missing

Hi Experts.

Has anyone encountered this error? "Object type for draft is missing".

 StockTransfer stDraft = (StockTransfer)oSup.oCompany.GetBusinessObject(BoObjectTypes.oStockTransferDraft);


            try
            {
                stDraft.CardCode = transferencia.ParceiroDeNegocio;
                foreach (var item in transferencia.ListaItens)
                {
                    stDraft.Lines.FromWarehouseCode = item.Deposito;
                    stDraft.Lines.ItemCode = item.ItemCode;
                    stDraft.Lines.Quantity = item.Quantidade;


                    stDraft.Lines.BinAllocations.BinActionType = BinActionTypeEnum.batFromWarehouse;
                    stDraft.Lines.BinAllocations.BinAbsEntry = item.Posicao;
                    stDraft.Lines.BinAllocations.Quantity = item.QtdPosicao;
                    stDraft.Lines.BinAllocations.Add();


                    stDraft.Lines.Add();
                }


                int iRetorno = stDraft.Add();
                if (!iRetorno.Equals(0))
                {
                    string sErro = oSup.oCompany.GetLastErrorDescription();
                    throw new Exception(sErro);
                }
            }
            catch (Exception)
            {
                
                throw;
            }