--On> ldpdd041:/tmp # cat set-ecname.ldif
dn: cn=config changetype: modify add: olcTLSECName olcTLSECName : secp384r1
The above does not appear to be a valid ldap modify statement. In particular, you seem to have a space that should not be there.
I.e., olcTLSSECName: secp38r41 NOT olcTLSSECName : secp384r1 --Quanah
