I'm running into a failure on the f_GenerateSndxIndex function from
FreeUDFLib. If I run:

SELECT f_GenerateSndxIndex('Église Baptiste de St-Augustin')
from rdb$database;

I get an error "Malformed string." It's clearly because of the accent
in 'Église', because if I eliminate that first accented character, it's
fine.

Does anybody have any suggestions or know of a fixed version?

Thanks.