log.debug({ title: "idString is not empty", details: `Setting custbody_referencetransactions to ${idString}` });
          context.newRecord.setValue({ fieldId: 'custbody_referencetransactions', value: idString });

The log entry goes off just fine with the correct values, but the values don't stick and nothing shows up in the system notes for the payment.

Unapply a payment from its invoice, this will leave a balance that can be applied to other invoices. Pick any invoice for that customer and click the "Accept Payment" button. Instead of processing the payment as usual, scroll down the the credits sublist and select the invoice. Instead of creating a new payment, NetSuite will modify the existing one, and the

context.newRecord

from the create goes away without impacting the edited payment. I guess I'll need to move my code to

afterSubmit

.

ugh, context.newRecordId is blank because its' context is create so afterSubmit doesn't work either. >.<

That usually helps me to discover what's frequently a typo or stupid gaffe on my part :)