not seeingn what i did wrong here

for (var i = 0; i < lineCount; i++) {
                if (sales_order.getSublistValue('item', 'itemtype', i) != 'Discount') {
                    items_by_location.push({
                        item_id: sales_order.getSublistValue('item', 'item', i),
                        item_name: sales_order.getSublistValue('item', 'itemname', i),
                        location: sales_order.getSublistValue('item', 'location', i),
                        committedQty: sales_order.getSublistValue(
                            'item',
                            'quantitycommitted',
                            i
                        ),
                        qty: sales_order.getSublistValue(
                            'item',
                            'qty',
                            i
                        ),
                    })
                    log.debug('added item to location and item list')
                }

            }

all is good besided the ITEMID is the same for everything?

I am not sure, but I think the field name is 'quantity' not 'qty'