How can I add a serial number to each item in item fulfillment?

[paulasokolowicz]

Hi!
I am having some issues with setting the serial number for each item in item fulfillment.
This is my code:

function add_item_fulfillment_test($mySalesOrderInternalId, $myTrackingNumber1, $myTrackingNumber2) {
    $reference = new InitializeRef();
    $reference->type = \NetSuite\Classes\InitializeRefType::salesOrder;
    $reference->internalId = $mySalesOrderInternalId;

    $record = new InitializeRecord();
    $record->type = \NetSuite\Classes\InitializeType::itemFulfillment;
    $record->reference = $reference;

    $request = new InitializeRequest();
    $request->initializeRecord = $record;

    $initResponse = NetSuiteSandboxService::getService()->initialize($request);

    if (!$initResponse->readResponse->status->isSuccess) {
        echo "INIT ERROR";
        return $initResponse->readResponse;
    }

    $itemFulfillment = $initResponse->readResponse->record;

    $package1 = new ItemFulfillmentPackage();
    $package1->packageWeight = 1;
    $package1->packageTrackingNumber = $myTrackingNumber1;

    $package2 = new ItemFulfillmentPackage();
    $package2->packageWeight = 1;
    $package2->packageTrackingNumber = $myTrackingNumber2;

    $packageList = new ItemFulfillmentPackageList();
    $packageList->package = [$package1, $package2];

    $itemFulfillment->packageList = $packageList;
    $itemFulfillment->packageList->replaceAll = true;

    $request = new AddRequest();
    $request->record = $itemFulfillment;

    $addResponse = NetSuiteSandboxService::getService()->add($request);

    if (!$addResponse->writeResponse->status->isSuccess) {
        echo "ADD ERROR";
        return $addResponse->writeResponse;
    } else {
        echo "ADD SUCCESS, id " . $addResponse->writeResponse->baseRef->internalId;
    }
}

and this is the AddRequest error response:

{
    "status": {
        "statusDetail": [
            {
                "code": "USER_ERROR",
                "message": "Please configure the inventory detail in line 1 of the item list.",
                "afterSubmitFailed": null,
                "type": "ERROR"
            }
        ],
        "isSuccess": false
    },
    "baseRef": null
}