Gurux.DLMS.GXDLMSServer.ReportError C# (CSharp) Method

        private byte[] ReportError(Command cmd, ErrorCode error)
        {
            switch (cmd)
            {
                case Command.ReadRequest:
                    cmd = Command.ReadResponse;
                    break;
                case Command.WriteRequest:
                    cmd = Command.WriteResponse;
                    break;
                case Command.GetRequest:
                    cmd = Command.GetResponse;
                    break;
                case Command.SetRequest:
                    cmd = Command.SetResponse;
                    break;
                case Command.MethodRequest:
                    cmd = Command.MethodResponse;
                    break;
                default:
                    //Return HW error and close connection..
                    break;
            }
            if (Settings.UseLogicalNameReferencing)
            {
                GXDLMS.GetLNPdu(new GXDLMSLNParameters(Settings, cmd, 1, null, null, (byte)error), replyData);
            }
            else
            {
                GXByteBuffer bb = new GXByteBuffer();
                bb.SetUInt8(error);
                GXDLMSSNParameters p = new GXDLMSSNParameters(Settings, cmd, 1, (byte)error, null, bb);
                GXDLMS.GetSNPdu(p, replyData);
            }
            if (this.InterfaceType == Enums.InterfaceType.WRAPPER)
            {
                return GXDLMS.GetWrapperFrame(Settings, replyData);
            }
            else
            {
                return GXDLMS.GetHdlcFrame(Settings, 0, replyData);
            }
        }