I'm using the Ticket Import feature and are using the excel template (also CSV for tests).
The required fields are ok when importing and also the regular fields built-in to WHD.
But when I enter data into the template under the Custom Fields I've created, the import fails with error "Custom field 'xxxxx' is not accessible by this object"
Without the custom fields data the import is only about 25% of what I need to import as there is a large amount of custom fields.