Order of Execution

I have a table initialization function as follows:

function buildTable()
{
    console.log("table is new");
    var t = $('#myTable').DataTable( {
     "destroy": true,
       "data": theTable.data,
       "columns": [
            {"data": "depotName"},
            {"data": "clientName"},
            {"data": "rtuName"},
            {"data": "deviceName"},
            {"data": "serialNumber"},
            {"data": "assetNumber"},
            {"data": "serviceTag"},
            {"data": "location"},
            {"data": "ipAddress"},
            {"data": "deviceType"},
            {"data": "deviceStatusMessage"},
            {"data": "quiesce"},
            {"data": "utilization"},
            {"data": "coverage"},
            {"data": "monoLifeCount"},
            {"data": "colorLifeCount"},
            {"data": "pageCountThisMonth"},
            {"data": "createdDate"},
            {"data": "lastActiveDate"},
            {"data": "deviceId"},
            {"data": "rtuId"},
            {"data": "clientId"},
            {"data": "depotId"}
        ],
     "columnDefs":
       [
        {
          "render": function( data, type,row)
             {
               return '<a href=/edit_device?deviceId=' + row[19] + '>' + data ;
             },
          "targets": 19
        }
       ],
     "buttons" :
       [
          'colvis',
         {
           extend: 'collection',
           text: 'Export',
           buttons:
           [
             {
               extend: 'print',
               orientation : 'landscape',
               pageSize: 'LEGAL',
               exportOptions: {
                 columns: [ ':visible' ]
               }
             },
             {
               extend: 'copyHtml5',
               exportOptions: {
                 columns: [ ':visible' ]
               }
             },
             {
               extend: 'csvHtml5',
               exportOptions: {
                 columns: [ ':visible' ]
                }
             },
             {
               extend: 'pdfHtml5',
               orientation : 'landscape',
               exportOptions: {
                columns: [ ':visible' ]
               }
             }
           ]
         }
       ]
    });

I have recently added the "data": section as I retrieve the table with web sockets and now my hyperlink as defined by the columnDef render function no longer works. It renders the column as follows:

<td><a href="/edit_device?deviceId=undefined">00F91526-8114-5DD4-877A-9ABBD720C697</a></td>

event though the data is present. This leads me to believe there may be an execution order problem or something I am missing.
sample row of rendered data

<tr role="row" class="odd"><td class="doLeft sorting_1">Pickering</td><td class=" doLeft">Laser Cartridge Services</td><td class=" doLeft">LCS - Home Office</td><td class=" doLeft">GWE505P01</td><td class=" doLeft">701531LM044FF-138-0</td><td class=" doLeft">missing</td><td class=" doLeft"></td><td class=" doLeft"></td><td>192.168.1.67</td><td>missing</td><td>missing</td><td>quiesce-off</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>2016-12-21 09:17:30</td><td>2016-12-21 09:17:30</td><td><a href="/edit_device?deviceId=undefined">00F91526-8114-5DD4-877A-9ABBD720C697</a></td><td>46053FD9-4DB9-503F-884F-EF753431F71F</td><td>F3B86EF2-CE9A-11E5-A838-00271353FF8D</td><td>1F30E1EF-DA3E-11E5-B267-00271353FF8D</td></tr>

Thanks for any assistance you may provide.