Doing some testing on the new Integer Course Custom Field type on v18. Previously, we've used a text field to hold the estimated duration for a course, but obviously would prefer it to be in a numerical field so we can aggregate values in reports, etc. Not wanting to manually update hundreds of courses, I've tried to use the "Course Upload" functionality, but for some reason it doesn't seem to be updating the values for the new field. I've defined a custom field with shortname estimated and am trying to use an upload file in the format:

shortname,customfield_estimated

Competencies for the Implementation of the updated Neonatal Hypoglycaemia Guideline,5

Is my syntax wrong, or should that file (when uploaded and with the appropriate settings) change the value of the "Estimated" field to 5 for the course called "Competencies for the Implementation of the updated Neonatal Hypoglycaemia Guideline"?

Have tried files both with and without speech marks around each field, seemingly to no avail. Have also tried updating a different custom field (the original text one) and also no changes. I note that in the Totara Help, there is no mention of the Custom Fields in the Course Upload, but the equivalent Moodle documentation (which it appears to be based on) does. Has the ability to upload to custom fields been removed as Totara has diverged from Moodle?