I used this snippet

Application.on('after:LiveOrder.addLine', function (model, currentLine) {
    nlapiLogExecution('debug', 'stuff', 'this is a test');
});

from this article: https://developers.suitecommerce.com/events.html#service-controller-and-backend-model-events However, the event never fires. I've tried

after:LiveOrder.addLines

as well with no result. Other events like

submit

are working as expected. What am I doing incorrectly?