ORA-12638: Credential retrieval failed

Question

I have a legacy VB6 application which I\'ve inherited. The issue I\'m facing is that I\'m getting the infamous

ORA-12638: Credential retrieval failed
         


        

Answer 1

I know this is a very old post but I have found a solution that has worked for me (Legacy VB6 Application):

Change the following entry in the sqlnet.ora file:

Original Entry - SQLNET.AUTHENTICATION_SERVICES= (NTS)

Modified Entry - SQLNET.AUTHENTICATION_SERVICES= (NONE)

Here is a LINK to the solution