ORA-28279: Error reading ldap_directory_access init parameter.
Cause : ldap_directory_access parameter is not specified corrrectly.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Make sure spfile.ora has ldap_directory_access set correctly. Possible correct values are PASSWORD, SSL and NONE.
Well, the reason for above error is that i have taken the above script from a 11g database and running it on 10g database. 11g has bring some changes in password management. Below code is executed on 11g and user created successfully, which is expected result.