Re: ORA-12638

This is a known bug caused by Windows 95 not being able to authenticate to NT. If you are using password authentication, e.g. "scott/tiger", you can get around it by setting the following parameter in the sqlnet.ora file on your laptop:
sqlnet.authentication_services=(NONE)

If you are using external authentication, i.e. "connect /", however, you're out of luck as it is not possible for 95 to authenticate a user to NT.

                                       Rick

"Kaka" <kaka_at_net-brothers.com> writes:

> Hi, there,
>
> I have set up Oracle running on windows NT server 4.0, then I set up a
> client on another NT server 4.0. Both machines work properly and I can
> connect from the client to the server no problem. However, I recently setup
> Oracle Client on my lap top running windows 95, when I tried to run SQL plus
> from windows95 and connect to the server, it kept saying
> ERROR:
> ORA-12638: Credential retrieval failed
>
> I would be very appreciated if some body could help.
>
> Thanks so much
>
>
> Richard
>
>

--

                                        Rick
                                        Rick Wessman
                                        Security and Directory Technologies
                                        Server Technologies
                                        Oracle Corporation
                                        rwessman_at_us.oracle.com

       The statements and opinions expressed here are my own and do not
             necessarily represent those of  Oracle Corporation.