Five geonim (rabbinic leaders of medieval Babylonian Jewry) were against while only one was in favor of reciting the formula.
For the same reason Rabbenu Yerucham, who lived in Provence about the middle of the 14th century, inveighed against those, who, trusting to the "Kol Nidrei", made vows recklessly, and he declared them incapable of giving testimony [REF].