Oracle : Ошибка ORA-06622

"LU6.2 Driver: Unable to attach to SNA"
*Cause: The SQL*Net LU6.2 driver could not attach to the SNA
software on your machine. The most likely cause is that the SNA
software is not operational.
*Action: Check the status of the SNA software, ensure that it is
operational and then try again.

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