CSV configuration in ds_import_file_transfer: missing, null or empty enclose uses the default double quote ("). Other enclosure values must contain exactly one byte. delimiter must also contain exactly one byte after expanding \t, \r and \n. Invalid values are reported in the route's msg result before any CSV import mode is started.

The use_load_file mode requires mysqli.allow_local_infile=On in the PHP configuration of the process running the import. If disabled or unavailable, the import is aborted and the configuration error is returned in msg. Other CSV import modes do not require this setting.