ORA-12526: TNS:listener: all appropriate instances

admin

ORA-12526:TNS:listener: all appropriate instances are in restricted mode
Cause: Database instances supporting the service requested bythe client were in
restricted mode. The Listener does not allow connections to instances inrestricted
mode. This condition may be temporary, such as during periods when database
administration is performed.
Action: Attemptthe connection again. If error persists, then contact the database
administrator to change the mode of the instance, if appropriate.