While less common than on Linux, this error can occur on Windows, usually due to the system PATH variable.
: The user running the command lacks read or execute permissions for the Oracle directories or the specific .msb (message) files. While less common than on Linux, this error
If DLLs are present but not registered properly, run: While less common than on Linux
Inspect message/shared library directories this error can occur on Windows
The actual library is missing. Reinstall the Oracle Instant Client or full client. After reinstallation, ldd shows all libraries found, and sqlplus works.
On Windows, error 57 often appears as: