I am getting the error: FixedColumns already initialised on this table

But this is the first time I've initalized it.

            $(document).ready(function(){                                                                                               
                timeslot_distribution_report_table#myrand# =        
                $("##timeslot_distribution_report#myrand#").dataTable
                        (
                            {
                                "scrollCollapse": true,
                                "paginate":false,
                                "filter":false,
                                responsive: false,
                                "destroy": true,
                                "scrollX": "99.99%",    
                                fixedColumns:   {
                                    leftColumns: 1
                                }                                                                                                                               
                            }
                );                                                                                                          
            });     

when i do it like this:

$(document).ready(function(){
timeslot_distribution_report_table =
$("##timeslot_distribution_report#myrand#").dataTable
(
{
"scrollCollapse": true,
"paginate":false,
"filter":false,
responsive: false,
"destroy": true,
"scrollX": "99.99%",
"initComplete": function(settings, json)
{
new $.fn.dataTable.FixedColumns(timeslot_distribution_report_table, {
leftColumns: 1,
heightMatch: 'auto'
} );
}
}
);
});

i get:

ReferenceError: timeslot_distribution_report_table is not defined
/manager_pro.cfm?action=managegames&league=598&content_action=view_schedules&schedule_id=36153:15

ignore the double quotes. theyre intended (for escaping purposes)