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TNS-12203: TNS:unable to connect to destination



TNS-12203: TNS:unable to connect to destination..

Answer / guest

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

Action: 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.

Please add more information about this Error

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