ClientScript - N/currentRecord Module help needed.

Hello, I am working on my first SuiteScript and am not able to figure out why the code below returns “undefined” for var wo.  This ClientScript  is called from a UserEventScript that creates a button on the Work Order record.  When all the currentRecord.CurrentRecord object Methods I tried returned “undefined” I assumed the current record was not being passed from the UserEventScript.  I then defined var woId using Property “id” of currentReocrd.CurrentRecord and it returned the correct internal ID.  In this first phase, I am just trying to pass various work order field values to the ui alert, before moving