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ORA-28040 Error with Oracle

Posted: Wed 10 Jan 2018 18:20
by John Liu
We were using dotConnect for Oracle 9.2 to work with Oracle in direct connect mode, everything worked great. We recently upgraded our oracle server to, and then got the following error when trying to connect to the database.
ORA-28040: No matching authentication protocol


Re: ORA-28040 Error with Oracle

Posted: Fri 12 Jan 2018 15:47
by Pinturiccio
Oracle 12c authentication in the Direct mode is supported starting from dotConnect for Oracle 9.2.220. For more information, please refer to ... story.html

There were also a few issues with connections to Oracle 12c server in the Direct mode in several subsequent versions. We recommend you to use the latest version of dotConnect for Oracle.