Error:widget: CFGRID: Response is empty

I've an error on the Coldfusion Ajax logger : "error:widget:
CFGRID: Response is empty". The headings of the cfgrid appear but
the contents not.
Here the Coldfusion Ajax logger answer :
- info:widget: Data loaded for grid, id: refTableau
- error:widget: CFGRID: Response is empty
- info:http: CFC invocation response:
- info:widget: Creating window: cf_window1191833821003
- info:widget: Created grid, id: refTableau
- info:http: HTTP GET
/bulte/admin/produits/gridDataManager.cfc?method=getData&returnFormat=json&argumentCollec tion=%7B%22page%22%3A1%2C%22pageSize%22%3A5%2C%22gridsortcolumn%22%3A%22%22%2C%22gridsortd irection%22%3A%22%22%2C%22idTableau%22%3A%22772%22%7D&_cf_nodebug=true&_cf_nocache=true&_c f_clientid=59BF758DB52E56355D649B34E232903B&_cf_rc=0
- info:http: Invoking CFC:
/bulte/admin/produits/gridDataManager.cfc , function: getData ,
arguments:
{"page":1,"pageSize":5,"gridsortcolumn":"","gridsortdirection":"","idTableau":"772"}
- info:LogReader: LogReader initialized
- info:global: Logger initialized
Here my cfm page code:
<cfparam name="URL.id" default="">
<cfquery name="qRec" datasource="#APPLICATION.db#">
SELECT *
FROM Produits
WHERE id=<cfqueryparam cfsqltype="cf_sql_integer"
value="#URL.id#">
</cfquery>
<cfset FORM.refTableau=qRec.refTableau>
<cfset MyXmlCode=FORM.refTableau>
<cfset mydoc = XmlParse(MyXmlCode)>
<cfset nbcolumns =
ArrayLen(mydoc.table.tr.XmlChildren)>
<cfset numLines = ArrayLen(mydoc.table.XmlChildren)>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0
Transitional//EN" "
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="
http://www.w3.org/1999/xhtml">
<head>
<title>fdgdfgdfgdfg</title>
<link rel="stylesheet" href="../admin.css" />
<meta http-equiv="Content-Type" content="text/html;
charset=utf-8" />
</head>
<cfwindow width="900" height="600" center="true"
resizable="false" draggable="true" initshow="true"
closable="false">
<cfform name="editForm" action="ifr_refTableau.cfm"
method="post" format="html">
<cfgrid format="html"
name="refTableau"
pagesize="5"
sort="yes"
selectmode="edit"
delete="yes"
bind="cfc:gridDataManager.getData({cfgridpage},{cfgridpagesize},{cfgridsortcolumn},{cfgri dsortdirection},'#URL.id#')"
onchange="cfc:gridDataManager.editData({cfgridaction},
{cfgridrow}, {cfgridchanged})">
<cfloop from="1" to="#nbcolumns#" index="k">
<cfgridcolumn name="Col_#k#" header="#k#" display="yes"
/>
</cfloop>
</cfgrid>
</cfform>
</cfwindow>
</body>
</html>
My cfc code :
<cfcomponent>
<cfset THIS.dsn="clients">
<cffunction name="getData" access="remote"
output="false">
<cfargument name="page" required="yes">
<cfargument name="pageSize" required="yes">
<cfargument name="gridsortcolumn" required="no">
<cfargument name="gridsortdirection" required="no">
<cfargument name="idTableau" required="yes">
<cfquery name="qRec" datasource="#THIS.dsn#">
SELECT refTableau
FROM Produits
WHERE id=<cfqueryparam cfsqltype="cf_sql_integer"
value="#ARGUMENT.idTableau#">
</cfquery>

<cfset MyXmlCode=qRec.refTableau>
<cfset mydoc = XmlParse(MyXmlCode)>
<cfset numItems =
ArrayLen(mydoc.table.tr.XmlChildren)>
<cfset numLines = ArrayLen(mydoc.table.XmlChildren)>

<cfset listHeader="">
<cfloop from="1" to="#numItems#" index="i">
<cfset listHeader=ListAppend(listHeader, "Col_#i#")>
</cfloop>
<cfset queryDatas = QueryNew(listHeader)>
<cfset temp = QueryAddRow(queryDatas, numLines)>
<cfloop index="i" from="1" to ="#numLines#">
<cfloop from="1" to="#numItems#" index="j">
<cfset temp = QuerySetCell(queryDatas,
ListGetAt(listHeader, j), mydoc.table.tr
.td[j].XmlText, i)>
</cfloop>
</cfloop>
<cfquery name="qReturn" dbtype="query">
SELECT *
FROM queryDatas
<cfif ARGUMENTS.gridsortcolumn neq "" or
ARGUMENTS.gridsortdirection neq "">
ORDER BY #ARGUMENTS.gridsortcolumn#
#ARGUMENTS.gridsortdirection#
</cfif>
</cfquery>
<cfreturn QueryConvertForGrid(qReturn, ARGUMENTS.page,
ARGUMENTS.pageSize)>
</cffunction>
<cffunction name="editData" access="remote"
output="false">
<cfargument name="gridaction">
<cfargument name="gridrow">
<cfargument name="gridchanged">
</cffunction>
</cfcomponent>
<body>
I don't understand why the return is empty.

I have the same problem. When the function is removed, the
query return many line of data, but when the queryconverforgrid is
added, the grid has the same number of line but all fields are
empty. Can someone please help???

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