by Ken Task.
Could also try this:
On the backup defaults screen of a 3.8 instance for settings,
the following are the short names for those options.
backup | backup_general_users
backup | backup_general_role_assignments
backup | backup_general_activities
backup | backup_general_blocks
backup | backup_general_files
backup | backup_general_userscompletion
backup | backup_general_logs
backup | backup_general_histories
backup | backup_general_questionbank
backup | backup_general_competencies
You could try this in config.php
An array for 'backup' with the options, all set to 1 (that means on)
Example below shows only 2 of the array above.
Assuming you would do them all.
$CFG->backup = array (
'backup_general_users' => '1',
'backup_general_logs' => '1',
);
Good luck!
'SoS', Ken