all rows duplicated when exporting to PDF or Excel

all rows of my grid are duplicated when I export them to pdf or excel.

<script type="text/javascript" src="./../../../lib/dhtmlxSuite/dhtmlxpro/dhtmlx.js"></script>

<script type="text/javascript" src="./../../../lib/dhtmlxSuite/dhtmlxGrid/codebase/dhtmlxcommon.js"></script>
<script type="text/javascript" src="./../../../lib/dhtmlxSuite/dhtmlxGrid/codebase/dhtmlxgrid.js"></script>
<script type="text/javascript" src="./../../../lib/dhtmlxSuite/dhtmlxGrid/codebase/ext/dhtmlxgrid_hmenu.js"></script>
<script type="text/javascript" src="./../../../lib/dhtmlxSuite/dhtmlxGrid/codebase/ext/dhtmlxgrid_mcol.js"></script>
<script type="text/javascript" src="./../../../lib/dhtmlxSuite/dhtmlxGrid/codebase/dhtmlxgridcell.js"></script>
<script type="text/javascript" src="./../../../lib/dhtmlxSuite/dhtmlxGrid/codebase/ext/dhtmlxgrid_markers.js"></script>
<script type="text/javascript" src="./../../../lib/dhtmlxSuite/dhtmlxCombo/codebase/dhtmlxcombo.js"></script>
<script type="text/javascript" src="./../../../lib/dhtmlxSuite/dhtmlxGrid/codebase/excells/dhtmlxgrid_excell_combo.js"></script>
<script type="text/javascript" src="./../../../lib/dhtmlxSuite/dhtmlxMenu/codebase/dhtmlxmenu.js"></script>
<script type="text/javascript" src="./../../../lib/dhtmlxSuite/dhtmlxMenu/codebase/ext/dhtmlxmenu_ext.js"></script>
<script type="text/javascript" src="./../../../lib/dhtmlxSuite/dhtmlxGrid/codebase/ext/dhtmlxgrid_filter.js"></script>

<script type="text/javascript" src="./../../../lib/dhtmlxSuite/dhtmlxGrid/codebase/ext/dhtmlxgrid_export.js"></script>
<script type="text/javascript" src="./../../../lib/dhtmlxSuite/dhtmlxGrid/sources/ext/dhtmlxgrid_json.js"></script>



<!--FOR DEBUGGING ONLY-->
<!--<script type="text/javascript" src="./../../../lib/dhtmlxSuite/dhtmlxDataProcessor/codebase/dhtmlxdataprocessor_debug.js"></script>-->


<script src="./../../../lib/jquery/jquery-1.7.2.js" type="text/javascript"></script>

<link rel="STYLESHEET" type="text/css" href="./../../../lib/dhtmlxSuite/dhtmlxpro/dhtmlx.css">
<link rel="STYLESHEET" type="text/css" href="./../../../lib/dhtmlxSuite/dhtmlxChart/codebase/dhtmlxchart.css">
<link rel="STYLESHEET" type="text/css" href="./../../../lib/dhtmlxSuite/dhtmlxTree/codebase/dhtmlxtree.css">
<!--<link rel="STYLESHEET" type="text/css" href="./../../../lib/dhtmlxSuite/dhtmlxGrid/codebase/dhtmlxgrid.css">-->


<div id="gridbox" style="width:2000px;height:1000px;"></div>

You are including dhtmlx.js at top , and after that add each file separately. But dhtmlx.js already includes all those files.

You need to include dhtmlx.js OR separate js files, there is no need to include both in the same time.

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