Convert Comma Separated Values To Each Separate Row with v_txtindex.StringTokenizerDelim

our current vertica version: Vertica Analytic Database v9.2.1-28

I tried to use v_txtindex.StringTokenizerDelim function to parse list to row.

--this works
select v_txtindex.StringTokenizerDelim('1,2,3,4,5,19 ',',') over () from dual

--this not works

select list_value,v_txtindex.StringTokenizerDelim(list_value,',') over ()
from tmp_list_val
where id = '12345';

And got error: ERROR: Function v_txtindex.StringTokenizerDelim(long varchar, unknown) does not exist, or permission is denied for v_txtindex.StringTokenizerDelim(long varchar, unknown)

please advice

thanks
David