server:/etc/openldap # ldapadd -x -D "cn=ldapadmin,o=lan,c=de" -W -f init.ldif 
Enter LDAP Password: 
adding new entry "o=lan,c=de"
ldapadd: update failed: o=lan,c=de
ldap_add: Internal (implementation specific) error (80)

server:/etc/openldap # tail /var/log/messages
Mar 27 12:03:33 server slapd[4108]: daemon: conn=0 fd=9 connection from IP=192.168.0.251:32774 (IP=0.0.0.0:389) accepted. 
Mar 27 12:03:33 server slapd[4116]: conn=0 op=0 BIND dn="cn=ldapadmin,o=lan,c=de" method=128 
Mar 27 12:03:33 server slapd[4116]: <= dn2id could not open dn2id.dbb 
Mar 27 12:03:33 server slapd[4116]: conn=0 op=0 RESULT tag=97 err=0 text= 
Mar 27 12:03:33 server slapd[4117]: conn=0 op=1 ADD dn="o=lan,c=de" 
Mar 27 12:03:33 server slapd[4117]: <= dn2id could not open dn2id.dbb 
Mar 27 12:03:33 server slapd[4117]: <= dn2id could not open dn2id.dbb 
Mar 27 12:03:33 server slapd[4117]: conn=0 op=1 RESULT tag=105 err=80 text= 
Mar 27 12:03:33 server slapd[4117]: conn=0 op=2 UNBIND 
Mar 27 12:03:33 server slapd[4117]: conn=0 fd=9 closed 
server:/etc/openldap #