Hi Ehud,
The attached "ref.csv" is comma separated, not ;. Anyway "FieldSeparators" is not an option for CSV import. Workaround
Import["path/to/file", "Table", "FieldSeparators" -> {";"}] // Dataset
I opened the file in a text editor and found that your file has commas, not semi colons.
You are right. Sorry.
I updated the csv file attached.
