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Im working with a grid control(1.5) and dataprocessor defined on it. Im using setTransactionMode function to send ...

Im working with a grid control(1.5) and dataprocessor defined on it. Im using setTransactionMode function to send all rows at once. Everithing works fine, but when there are more than 6 rows updated, I got a javascript error:
first an Alert box:
Error type: LoadXML
Description: Incorrect XML

then a js error:
"The system cannot locate the recource specified."

My server-script creates the XML response like this:
<?xml version="1.0" encoding="iso-8859-1" ?>
<data>
<action type="update" sid="106997" tid="106997"></action>
<action type="error_hh">Error found at row #7</action>
<action type="update" sid="106999" tid="106999"></action>
</data>

Where "error_hh" is a function that just display an alert().

My code to define dataprocessor is:

if (typeof(myDataProcessor_ldp) == "undefined") {
myDataProcessor_ldp = new dataProcessor("savehandler_modificar_listado_documentos_proyecto2_pr.php?uid=" + new Date().valueOf() + "&proyectoTB=417&areaTB=" + codigo_area_ldp + "&tipo_proyectoTB=P");
myDataProcessor_ldp.setUpdateMode("off");
myDataProcessor_ldp.setOnBeforeUpdateHandler(validarDatosFila);
myDataProcessor_ldp.setOnAfterUpdate(onAfterUpdateLDP);
myDataProcessor_ldp.defineAction("error_hh",myErrorHandlerHHLDP);
myDataProcessor_ldp.setTransactionMode("post",true);                
myDataProcessor_ldp.enableDebug(true);                
myDataProcessor_ldp.init(mygrid_ldp);
} else {
myDataProcessor_ldp.serverProcessor = "savehandler_modificar_listado_documentos_proyecto2_pr.php?uid=" + new Date().valueOf() + "&proyectoTB=417&areaTB=" + codigo_area_ldp + "&tipo_proyectoTB=P";                
myDataProcessor_ldp.init(mygrid_ldp);
}

Please help me, I dont know what to do with this error.

>>Error type: LoadXML
>>Description: Incorrect XML

Such message may occur only if grid wasn't able to parse incoming XML, the most common reason - incorrect XML response.
Can it be that message returned by error_hh may contain some special characters, which can corrupt XML ? To resolve such potential problem you can wrap the content of action in CDATA
    <action type="error_hh"><![CDATA[ Error found at row #7 ]]></action>

If problem still occurs - please provide any demo page|link where issue can be reconstructed ( you can send details to support@dhtmlx.com )