Creating Item Receipts from POs via SuiteScript - netsuite

Question

I'm in the process of creating a module to handle multi-PO consolidated shipments (fx imports) and writing a script to receive multiple POs with landed costs per line.
I'm using SuiteScript API 1.0
However, when I create the Item Receipt record (and include the PO# in the createdfrom field to create the link from IR to PO, during the process of copying the PO lines to the IR lines, I'm getting constant SSS_INVALID_SUBLIST_OPERATION errors.
The code in question is below:
// ** set body fields
receiptRec.setFieldValue('location',purchRec.getFieldValue('location'));
receiptRec.setFieldValue('entity',purchRec.getFieldValue('entity'));
receiptRec.setFieldValue('createdfrom',purchRec.getFieldValue('internalid'));
receiptRec.setFieldValue('currency',purchRec.getFieldValue('currency'));
receiptRec.setFieldValue('exchangerate',purchRec.getFieldValue('exchangerate'));
receiptRec.setFieldValue('isbasecurrency',purchRec.getFieldValue('isbasecurrency'));
receiptRec.setFieldValue('exchangerate',purchRec.getFieldValue('exchangerate'));
receiptRec.setFieldValue('landedcostperline','T');
log ('Receipt Record:'); log( receiptRec );
// ** copy item lines
var POlines = purchRec.getLineItemCount('item');
for ( line=1 ; line<=POlines; line++) {
var fulfill = purchRec.getLineItemValue('item','fulfillable',line); log('Fulfill?? '+fulfill)
if (fulfill == 'T') {
log('Fill From PO Line #'+line);
receiptRec.selectNewLineItem('item'); log('Debug 1');
receiptRec.setCurrentLineItemValue('item','item',purchRec.getLineItemValue('item','item',line)); log('Debug 2');
receiptRec.setCurrentLineItemValue('item','itemreceive','T',line); log('Debug 3');
receiptRec.setCurrentLineItemValue('item','quantity',purchRec.getLineItemValue('item','quantity',line)); log('Debug 4');
receiptRec.setCurrentLineItemValue('item','rate',purchRec.getLineItemValue('item','rate',line)); log('Debug 5');
receiptRec.setCurrentLineItemValue('item','taxcode',purchRec.getLineItemValue('item','taxcode',line)); log('Debug 6');
receiptRec.setCurrentLineItemValue('item','units',purchRec.getLineItemValue('item','units',line)); log('Debug 7');
receiptRec.commitLineItem('item'); log('Debug 8');
}
}
The error is triggering at the selectNewLineItem('item') point.
receiptRec is the newly created itemreceipt record.
purchRec is the existing purchase order record.
What am I missing here?

Answer 1

You cannot "create" a new Item Receipt record in Netsuite. You need to "transform" a Purchase Order into an Item Receipt using nlapiTransformRecord('purchaseorder', purchaseorderid, 'itemreceipt'). This will automatically copy all the line items, and then you can iterate through them to change quantities or remove lines completely, however you cannot add new lines.
See this link in the documentation for more information.