Is there a way to match a line on an Item fulfillment with that of the created from (sales order)? The sys_id keeps changing so it's not matching up.

Yes, there is an orderline property on the lines of the item fulfillment

The orderline was unobtainable with getSublistValue. at least it was coming back empty

Are you trying to access it on create or edit?

edit

Odd

It's in an afterSubmit. I was able to re-load the IF and it just started working

Happy to take another look if you have code snippets / logs to review. I've struggled with this myself so I feel your pain haha

Thanks @Jan Petri

{
    const salesOrd =record.load({
            id: createdFrom,
            type: record.Type.SALES_ORDER,
            isDynamic: false
        });
     newRec = record.load({
        id: newRec.id,
        type: record.Type.ITEM_FULFILLMENT,
        isDynamic: false
     });
logIds(newRec, salesOrd, 1)
}
function logIds(newRec, salesOrd, seq) {
        const lineSysIds = [];
        const lineSysIdsSOs = [];
        if (newRec) {
            const cnt = newRec.getLineCount('item');
            for (let i = 0; i < cnt; i++) {
                lineSysIds.push(newRec.getSublistValue({ sublistId: 'item', fieldId: 'sys_id', line: i }));
            }
        }
        if (salesOrd) {
            const cntSO = salesOrd.getLineCount('item');
            for (let i = 0; i < cntSO; i++) {
                lineSysIdsSOs.push(salesOrd.getSublistValue({ sublistId: 'item', fieldId: 'sys_id', line: i }));
            }
        }
        if (!seq) {
            seq = 0;
        }
        log.debug('grr' + seq, { lineSysIds, lineSysIdsSOs });
    }

Is there a reason you're using sys_id as opposed to the "line" and "orderline"? So on the SO you could use fieldId "line" and on the IF you could use fieldId "orderline". At least that's what I've used to match lines between SO and IF

I just switched to lines. I thought sys_id would be much better, but they change

Been there done that haha

Eventually all these fun NS Application oddness gets forever burnt into your memory.