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


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.


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


Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms