Creating Assembly build transaction using script

Hi,

I am trying to create an assembly build transaction using script by transforming an workflow in to assembly build but it gave error that  - please
configure inventory detail at line 1.

Please provide a sample code for creating assembly build using script and how I can iterate over component sublist and configure inventory detail.

I am using following code -

function createAssemblyBuildAfterSubmit(type){

  try{
  
      if(type == 'create' || type == 'edit'){
      
       var iqProductionRec = nlapiGetNewRecord();
       nlapiLogExecution( 'DEBUG', 'ID: ', iqProductionRec.getId());
       var fromRecord = 'workorder';
       var fromId = iqProductionRec.getFieldValue('custrecordiqf1_workorderref'); // 1142 Id of the workorder quantity = 19000
       var toRecord = 'assemblybuild';
       var defaultV = new Array();