ORA-12322: unable to mount database (link name string)

Cause : This message should be accompanied by additional error messages that indicate the cause of the problem.

Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts

Follow the steps outlined in the accompanying error messages to resolve the problem.

update : 22-09-2017
ORA-12322

ORA-12322 - unable to mount database (link name string)
ORA-12322 - unable to mount database (link name string)

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    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.