With a LandedCost record, how do I update the quantity expected? Code: (-1 is for testing)

newRec.setSublistValue({
    sublistId: 'items',
    line: i,
    fieldId: 'quantity',
    value: Number(qty) - 1
});

Error:

You have attempted an invalid sublist or line item operation. You are either trying to access a field on a non-existent line or you are trying to add or remove lines from a static sublist.

sublist id is likely

item

not

items

?

@Shawn Talbert It was items. I just got it working, but i don't remember what it was now lol. The problem i'm facing at the moment is trying to change the qtyExpected on the inbound when an item receipt is created. Getting:

The Item line cannot be changed as it shares a landed cost amount with items on an Inbound Shipment which have been partially or fully received

wow, leave it to NS to use plural items sublist name in one spot and singular most everywhere else.

hahaha