I am having some issues with the below workflow script, which is suppose to give a me a total across all line items of total quantity fulfilled on a given sales order, however it is just returning a "0" value. any help is appreciated.

function updateTotalQuantity(type, name) {
//initialize variable for total quantity
var totalQuantity = 0;

// count number of lines in 'item' sublist
var itemCount = nlapiGetLineItemCount('item');
//for each line in the 'item' sublist, add value in quantity column to the total quantity variable
for(var i=1; i<=itemCount; i++){
lineLevelQuantity = nlapiGetLineItemValue('item', 'quantityshiprecv', i)
if(lineLevelQuantity != '' && lineLevelQuantity != null ) { totalQuantity += parseInt(lineLevelQuantity); } }