EUSException: There is no such user in directory

In order to do user operations on a oracle internet directory(OID) entry like granting role or  proxy permission, that entry should have "orclUser" object class:

without this object class following error occurs:

EUSException: There is no such user in directory

that is because OID searches user with a similar search query as:

ldapsearch -h oid_host -p 389 -D "user_dn" -w pasword -b "search_user_dn" -s base "objectclass=orcluser"

if entry does not have orclUser object class then search does not return any result.