I'm trying to list all the serial numbers that have been allocated on an item fulfilment. I'm trying to do this on an aftersubmit event as below.

define(['N/record','N/search'],

    function(record,search){

        function afterSubmit(context) {

            if(context.type == 'create' || context.type == 'edit'){

                var rec = context.newRecord;

                //Load saved search for serial numbers

                var serailnumbersearch = search.load({id: 'customsearch_wrsinventorynumbersforso'})

                serailnumbersearch.filters.push(['transaction.internalid','anyof', rec.id])

                var serailnumbersearch = serailnumbersearch.run()

                var serailnumbersearch = serailnumbersearch.getRange({start: 0, end: 50});

                //Loop through saved search

                for (var i = 0; i < serailnumbersearch.length; i++){

                    log.debug('Serial Number',serailnumbersearch[i].getValue('inventorynumber'));

                }

            }

        }

        return {afterSubmit: afterSubmit}