Hello, 

Thank you for your feedback and help.  I tried adding in the new option to 
the chartRangeSlider but I am still getting the same error.

        var myIdSlider = new google.visualization.ControlWrapper({  
        'controlType': 'ChartRangeFilter',  
        'containerId': 'control_div',  
        'options': {  
            'filterColumnLabel': columnNames.split(',')[4],
            'filterColumnIndex': '4',
            },
            'chartView': { 'columns': [4, 1] }
          });

As further reference, this is what my data looks like behind:

<script 
type="text/javascript">google.load('visualization','1.0',{'packages':['corechart','controls']});google.setOnLoadCallback(function(){drawVisualization([{"ColumnName":"WESTC","Value":72,"Type":"TALK","Date":"\/Date(1394582400000)\/","ID":538321},{"ColumnName":"SAYB","Value":98,"Type":"TK","Date":"\/Date(1394582400000)\/","ID":538320},{"ColumnName":"INDEP","Value":98,"Type":"TK","Date":"\/Date(1394582400000)\/","ID":538319},{"ColumnName":"GEMST","Value":4,"Type":"TK","Date":"\/Date(1394582400000)\/","ID":538318},{"ColumnName":"DASH2","Value":95,"Type":"TK","Date":"\/Date(1394582400000)\/","ID":538317}],'Text
 
Example','Text Example','Text Example','Type,');});</script


Many thanks for your help and time.

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