Oracle : Ошибка ORA-16625

16625, 0000, "cannot reach database \"%s\""
*Cause: The command could not be executed because the database noted
in the error text was not reachable from the database where
the command was issued.
*Action: See accompanying messages for more information. Check the network
connections to the specified database. Alternatively, connect to
a different database in the Data Guard broker configuration and
retry the command.

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