Hi. I have a custom record type that is a child record of work orders.  If I do a search on the custom records, I see the 'created' field as expected.  This is the NetSuite-provided 'created' field, not a custom field.  Its id is just 'created'.  If I look at a work order and look at the tab that displays the custom records, I see the created field as expected.

However, if I iterate through the custom records as sublist entries and do
'wo.getLineItemValue('rechmach-blah-blah','created',i) I get an empty string, not the created value.  This is in a client script.  Getting other fields works fine.