ORA-28168: attempted to grant password-protected role

Cause : An ALTER USER ... GRANT CONNECT command was attempted specifying a role that is protected by a password as a role which the proxy may execute on behalf of a client.

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

Either specify a role that does not have a password or alter the role so that a password is not required.

update : 23-08-2017
ORA-28168

ORA-28168 - attempted to grant password-protected role
ORA-28168 - attempted to grant password-protected role

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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.