ORA-12231: TNS:No connection possible to destination

Cause : This error is reported by an interchange which fails to find a possible connection along the path to the destination.

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

Report the problem to your Network Administrator so that he may fix the problem.

update : 27-04-2017

ORA-12231 - TNS:No connection possible to destination
ORA-12231 - TNS:No connection possible to destination

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    Oracle Database High Availability Any organization evaluating a database solution for enterprise data must also evaluate the High Availability (HA) capabilities of the database. Data is one of the most critical business assets of an organization. If this data is not available and/or not protected, companies may stand to lose millions of dollars in business downtime as well as negative publicity. Building a highly available data infrastructure is critical to the success of all organizations in today's fast moving economy.

    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.