Now record wont save

So i have two column fields on the item line that i am checking against to see if one is filled in and its comments field is blank then throw error. But for some reason it keeps saying its missing the comments :h_a_w: even when i remove the main field. Can anyone see why this is happening:

function onSaveRecord(){

                     var itemCount = nlapiGetLineItemCount('item');
var itembillingCount = 0;

// scroll items
for (i = 1; i <= itemCount; i++) {
  var itemBillSched = nlapiGetLineItemValue('item', 'billingschedule', i);
  var itemBillComment = nlapiGetLineItemText('item', 'custcol_billingschedulecomments', i);
                                           var itemName = nlapiGetLineItemValue('item', 'item', i);

                                          // test location
  if (itemBillSched != null && itemBillComment == '') {