Error 951 User name is not known on the database server

Technote (troubleshooting)


Problem(Abstract)

Error -951 returned by Dynamic Server (IDS) on Windows when using dbaccess.

Resolving the problem


As user informix, you attempt to connect to IBM® Informix® server on a Windows platform using dbaccess, and receive the following error message:

    -951:  Incorrect password or user informix is not known
            on the database server

Same time you may receive following error message in the message log file:
    listener-thread: err = -951: oserr = -###: errstr = informix:
    Incorrect password or user informix is not known on the database server.

CAUSE

The error -951 typically relates to the domain name server (DNS) or user authentication. The following situations can cause error -951:
  • Informix user account was deleted and recreated
  • Windows server membership has changed from domain to workgroup
  • Windows server membership has changed from workgroup to domain
  • Change in domain default policy for informix domain user
  • User ‘informix’ is not a member of administrator group at the server
  • Informix user password has expired

SOLUTION

The problem can generally be resolved by reinstalling Informix server product per the Installation Guide for IBM® Informix® Dynamic Server for your Windows platform. It may be necessary to remove the Informix registry entries and remove and recreate the user informix and group Informix-Admin.

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Document information


More support for:

Informix Servers

Software version:

10.0, 11.1, 11.5, 11.7, 12.1

Operating system(s):

Windows

Reference #:

1200068

Modified date:

2005-04-22

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