Even then it seems that there aren't that many checks you can do, other than: -warning if different rows have different numbers of columns -warning if the fil

Even then it seems that there aren't that many checks you can do, other than: -warning if different rows have different numbers of columns -warning if the file ends without closing escaping Without meta data you can't check data types. A missing escape character might result in a valid CSV (just not the one intended).