It shouldn't be; I've used it all the time for editing records, though not in WA scripts specifically. I am thinking that your current approach using

getNewRecord

is basically not working because: 1. NetSuite loads the record out of the database 2. NetSuite invokes your WA action 3. Your WA retrieves a second instance of the record and modifies it 4. Your WA updates the record in the database 5. NetSuite renders the form with the first instance it loaded from the db