1 Reply Latest reply on Nov 6, 2012 6:32 AM by 929328

    Cannot connect to 10g instance from 11g client (ORA-12638)

      I don't know why I have problems when I connect from a 11g client to a 10g server. I get the error ORA-12638.
      However, it works fine doing the same with a 10g client.

      Can anybody tell me how to avoid this problem without having to install the 10g client ?

      Thanks in advance.
        • 1. Re: Cannot connect to 10g instance from 11g client (ORA-12638)
          Hi, user7409638,

          To understand the problem, I advice you to enable tracing and have a look at it.
          As you may know, ORA-12638 is the problem with the authentication service.
          It was just unable to get your credentials.

          If you want me finally get the solution, please report it at my system http://1dayotn.blogspot.de/p/question-me_7.html

          If you have any questions, ask.
          Kirill Babeyev