openldap 2.1.6 & cyrus 2.1.9 & DIGEST-MD5: Error using ldappasswd

["Josef.Irnberger" <Josef.Irnberger@fh-sbg.ac.at>]

H list,

When I execute "ldappasswd -Y DIGEST-MD5 -U jirnberg" (my username) I get:

Result: Internal (implementation specific) error (80)
Additional info: entry modify failed

and also the openldap server says: 

--snip--
bdb_modify_internal: 0x00000005: uid=jirnberg,dc=ldapdemo,dc=com
====> bdb_cache_return_entry_w( 5 ): returned (0)
send_ldap_extended err=80 oid= len=12
send_ldap_response: msgid=4 tag=120 err=80
--snip--

Does anybody know, why the entry cannot be modified? (I don't have any ACLs yet,
so any user should be allowed to do anything)

TIA
      
Josef Irnberger
Student of Telecommunication Engeneering
University of Applied Sciences, Salzburg
      

p.s.: Is there any documentation available for the ldap_sasl_bind_s() Method?