var params= {sublistId: 'item', line: line_num}; p...
# suitescript
g
var params= {sublistId: 'item', line: line_num}; params.fieldId = 'inventorydetail'; params.line =0; var curRecord = po_record.getSublistSubrecord(params); params.sublistId = 'inventoryassignment'; params.fieldId = 'inventorynumbers'; var currentNumbers = curRecord.getValue(params); params.value = [serial#]; curRecord.setValue(params); var id = po_record.save({ enableSourcing: true, ignoreMandatoryFields: true });