Undefined property: FormConnector::$extra_output

I have a error when trying to save to the database and sometimes saves and sometimes don’t so please help me.

The next function is the one that load the form inside of a Windows and then I try to save it

function winMntClientes(selId){            
            var dhxWins = new dhtmlXWindows();
            dhxWins.enableAutoViewport(false);
            dhxWins.attachViewportTo("parentId");
            dhxWins.setImagePath("classes/codebase/imgs/");
            
            var w1 = dhxWins.createWindow("w1", 20, 30, 790, 330);
            w1.setText("Mantenimiento de Usuarios");
            
            var edFrmClnt = w1.attachForm(editClientFrm);
            
            edFrmClnt.load("connectors/guarda_client.php?action=get&id="+selId);
            var dpfusuario = new dataProcessor("connectors/guarda_client.php");
            dpfusuario.init(edFrmClnt);            
            
            edFrmClnt.attachEvent("onButtonClick", function(id){
                if (id=='saveButton'){
                        edFrmClnt.save();
                }
            })
            
            dpfusuario.attachEvent("onAfterUpdateFinish",function(){
              cargaClientes();
              w1.close();
            })
        }

and the guarda_client.php file is:

<?php
	require_once("../conf/config.php");

	$res=mysql_connect($mysql_server,$mysql_user,$mysql_pass);
	mysql_select_db($mysql_db);

	require("../classes/codebase/form_connector.php");

	//ConnectorSecurity::$security_key = true;
    
	//$_id = $_GET["id"];

	$conn = new FormConnector($res,"MySQL");// connector initialization
    $conn->enable_log("../log.txt",true);
    $conn->render_table("cliente");
    //$conn->render_table("cliente","clienteID","nombre, direccion, telefono, celular, bbm, email, estado, lat, lgn, emergencia");// data configuration 

?>

So when I go to check the log I see the follow input:

The log have the next error:

====================================
Log started, 30/06/2013 06:06:34
====================================

SELECT `clienteID`,`usuarioID`,`nombre`,`direccion`,`telefono`,`celular`,`bbm`,`email`,`estado`,`lat`,`lgn`,`emergencia` FROM cliente WHERE `clienteID` = '2'

Undefined property: FormConnector::$extra_output at D:\BitNami\wampstack-5.4.16-0\apache2\htdocs\backendg4s\classes\codebase\base_connector.php line 714

Done in 0.19201111793518s

And don’t save anything but can’t find out what is going on here.

a) try to define all involved fields

use
$conn->render_table(“cliente”,“clienteID”,“nombre, direccion, telefono, celular, bbm, email, estado, lat, lgn, emergencia”);

instead of
$conn->render_table(“cliente”);

b) try to update connector files with the attached ones
connector-codebase.zip (70 KB)