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If you are prompted to set the ORACLE_UNQNAME environment variable, then set this variable and run the emctl command again. Set the variable to the database unique name (the value of the DB_UNIQUE_NAME database parameter). A typical value for DB_UNIQUE_NAME is orcl.

Make sure the ORACLE_UNQNAME environment variable is set to the unique name of the database to which you want to connect, for example orcl.

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