Oracle : Ошибка ORA-12557

"TNS:protocol adapter not loadable"
*Cause: On some platforms (such as OS/2) protocol adapters are loaded at
run-time. If the shared library (or DLL) for the protocol adapter is
missing or one of its supporting libraries is missing then this error is
*Action: For further details, turn on tracing and reexecute the operation.
The trace file will include the name of the shared library (or DLL) that
could not be loaded.

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