ORA-12522: TNS:listener could not find available instance with given INSTANCE_

ORA-12522
ORA-12522: TNS:listener could not find available instance with given INSTANCE_
ROLE
Cause: There are not any available and appropriate database instances registered
with the listener, that are part of the service identified by SERVICE_NAME given
in the connect descriptor and that have the specified INSTANCE_ROLE (and
INSTANCE_NAME, if specified).

More details : Viste http://www.high-oracle.com/ora-12522/
More details : Viste http://www.high-oracle.com/ora-12522/
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Your source for help on all Oracle database error codes :
------------------------
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ORA-02255: obsolete 7.1.5
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Error Oracle : ora-00351 http://www.high-oracle.com/ora-00351/
Error Oracle : ora-32740 http://www.high-oracle.com/ora-32740/
Error Oracle : ora-03212 http://www.high-oracle.com/ora-03212/
Error Oracle : ora-00448 http://www.high-oracle.com/ora-00448/
Error Oracle : ora-12540 http://www.high-oracle.com/ora-12540/
Error Oracle : ora-25195 http://www.high-oracle.com/ora-25195/
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Error Oracle : ora-39001 http://www.high-oracle.com/ora-39001/
Error Oracle : ora-19699 http://www.high-oracle.com/ora-19699/
Error Oracle : ora-19211 http://www.high-oracle.com/ora-19211/
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