/// <summary>
        /// Imports all the messages used by this step
        /// </summary>
        /// <param name="aStep"></param>
        private void importStepMessages(DataDictionary.Tests.Step aStep)
        {
            string sql = "SELECT TCSOrder, MessageOrder, MessageType, Var_Name, Var_Value FROM TSW_MessageHeader ORDER BY MessageOrder, Var_Row";

            OleDbDataAdapter adapter = new OleDbDataAdapter(sql, Connection);
            DataSet dataSet = new DataSet();

            adapter.Fill(dataSet);
            if (dataSet.Tables.Count > 0)
            {
                int messageNumber = 0;
                DataDictionary.Tests.DBElements.DBMessage message = null;
                int order = -1;
                foreach (DataRow dataRow in dataSet.Tables[0].Rows)
                {
                    object[] items = dataRow.ItemArray;
                    order = (int)items[0];
                    if (order == aStep.getTCS_Order())
                    {
                        short messageOrder = (short)items[1];
                        if (messageNumber != messageOrder)  // we create a new Message
                        {
                            if (messageNumber != 0)
                            {
                                aStep.AddMessage(message);
                                importPackets(message, order);
                            }
                            short messageTypeNumber = (short)items[2];
                            DataDictionary.Generated.acceptor.DBMessageType messageType = DataDictionary.Generated.acceptor.DBMessageType.defaultDBMessageType;
                            switch (messageTypeNumber)
                            {
                                case 0:
                                    messageType = DataDictionary.Generated.acceptor.DBMessageType.aEUROBALISE;
                                    break;
                                case 1:
                                    messageType = DataDictionary.Generated.acceptor.DBMessageType.aEUROLOOP;
                                    break;
                                case 2:
                                    messageType = DataDictionary.Generated.acceptor.DBMessageType.aEURORADIO;
                                    break;
                            }
                            message = (DataDictionary.Tests.DBElements.DBMessage)DataDictionary.Generated.acceptor.getFactory().createDBMessage();
                            message.MessageOrder = messageOrder;
                            message.MessageType = messageType;
                            messageNumber = messageOrder;
                        }
                        DataDictionary.Tests.DBElements.DBField field = (DataDictionary.Tests.DBElements.DBField)DataDictionary.Generated.acceptor.getFactory().createDBField();
                        string variable = items[3] as string;
                        if (variable != null)
                        {
                            field.Variable = variable;
                        }
                        string value = items[4] as string;
                        if (value != null)
                        {
                            field.Value = DataDictionary.Tests.Translations.Translation.format_decimal(value);
                        }
                        message.AddField(field);
                    }
                }
                if (message != null)
                {
                    aStep.AddMessage(message);
                    importPackets(message, aStep.getTCS_Order());
                }
            }
        }