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    Oracle Error ORA-12203: TNS:unable to connect to destination

    admin November 15, 2022 No Comments

    Oracle Error Message

    ORA-12203: TNS:unable to connect to destination

    Reason for the Error

    Invalid address specified or destination is not listening. This error can also occur because of underlying network or network transport problems.

    Solution

    Verify that the net service name you entered was correct. Verify that the ADDRESS portion of the connect descriptor which corresponds to the net service name is correct. Ensure that the destination process (for example the listener) is running at the remote node.

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