warning during slapindex

[FM <dist-list@LEXUM.UMontreal.CA>]

Hello I receive this error during slapindex (3 times):
/etc/openldap2.2/slapd.access.conf.new: line 36: "expand" style or 
modifier used in conjunction with a non-regex <what> clause

here is my access (the last line is line 36):

access to dn.subtree="ou=domains,dc=example,dc=com"
by group.expand="cn=SAMBABindUSers,ou=LdapSystem,dc=example,dc=com" write

by group.expand="cn=Domain Controllers,ou=Group,dc=example,dc=com" 
   write

by group.expand="cn=Replicator,ou=Group,dc=example,dc=com" write
by *    read


What is wrong with these ?