name":"INVALID_FLD_VALUE","message":"Value 0.0 outside of valid min/max range for field quantity",

/**
 * @NApiVersion 2.x
 * @NScriptType UserEventScript
 * @NModuleScope SameAccount
 */
 define(['N/record', 'N/search'],
 /**
  * @param {record} record
  * @param {search} search
  */
 function(record, search) {
    

     function beforeLoad(scriptContext) {

         var recType = record.load({type: record.Type.ITEM_FULFILLMENT, id: 5679548, isDynamic:true});

         var count = recType.getLineCount({sublistId:'item'});


         for ( var i=0; i < count ; i++)
         {
             var selectLine = recType.selectLine({sublistId:'item',line:i});
             var id = recType.getCurrentSublistValue({sublistId:'item',fieldId:'id'});
             var fulfillmentQty = recType.getCurrentSublistValue({sublistId:'item',fieldId:'quantity'});
             var nsdrReturn  = recType.getCurrentSublistValue({sublistId:'item',fieldId:'custcol_delivery_routing_return_qty'});
           	 var adjQty = fulfillmentQty - nsdrReturn;
               log.debug({
                     title: ({title: 'new qty'}),
                     details: adjQty
                 })
 
             log.debug(id + fulfillmentQty + nsdrReturn);
             recType.setCurrentSublistValue({sublistId:'item',fieldId:'quantity',value: adjQty});
             recType.commitLine({sublistId:'item'});
         }
         
         //commit the item record.  The sublist will update
         recType.save();
     }
 
     return {
         beforeLoad: beforeLoad,
     };
     
 });