ORA-27157: OS post/wait facility removed
Cause : the post/wait facility for which the calling process is awaiting
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
check errno and contact Oracle Support
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.