Transform PO to Item Receipt with Bins

@param

[SOLVED - Need to set customform of itemreceipt]

Hope someone can help me with this before the dent in my forehead gets any deeper.

I am trying to transform a Purchase Order to an Item Receipt, with the Items using Advanced Bin Management via a RESTlet. No matter what I try, on submission the transformed record returns the extremely helpful error that I am missing an "id".

My SuiteScript code for this is:

 function itemReceipt(dataIn) {      /*       * Have to look up items by itemname.       *       * @param {Array} items List of items received from the cache       * @param {String} itemname The itemname from the itemreceipt's item list.       *