ORA-12557: TNS:protocol Adapter Not Loadable When Trying to Use the 32-bit Oracle ODBC Driver on 64-bit Windows

(Doc ID 1516753.1)

Last updated on JULY 05, 2017

Applies to:

Oracle ODBC Driver - Version 11.2.0.1 and later
Microsoft Windows (32-bit)
Microsoft Windows x64 (64-bit)
*** Currency Check was done on 14th Jun 2017 ****

Symptoms

Applies to all Windows 64-bit OS.

When trying to connect using the 32-bit Oracle ODBC Driver the error occurs: ORA-12557: TNS:protocol adapter not loadable error.

Changes

 Both 32-bit and 64-bit Oracle client and odbc where installed on the machine.

Cause

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