The pre-edit hook example re-added _____DELETE__THIS__RECORD_____="No" when
it re-read the table, mirroring the data step getdata.sas used to run. That
column is created by the editor itself (it is the Delete? column) and is
never part of the dataset, so the example no longer adds it - and a response
that carries the name is refused by the editor, which the "What the hook
does" bullet now states.
Also notes the reserved name on the MPE_TABLES page, and says in the user
guide that the Delete? column is created by Data Controller rather than
being part of the table.