Problem with Schema in Openldap 2.3.19

["Eugenia Candida Oliveira de Moura" <eugeniacandida@gmail.com>]

Hi,

I'm using openldap 2.3.19 and when I try to add to a new attribute in the entry cn=schema,cn=config I have the following error:
     <olcAttributeTypes> handler exited with 1

Why this error occurs? 
Some ideia?

Thanks.