Hey all, I have a script that is using record.attach at try and attach credit memo to sales orders, however I am getting the error 'Attaching of record type creditmemo to salesorder is not supported', is there any way to attach these records together via script?

no, the record.attach is the equivalent if clicking the attach button on the record

How would I go about making a credit memo appear in the related records of a sales order?

you dont