Upfront: The problem was solved by re-installing UniData

My client had UniData 7.2.3 on Windows within his domain. He rebooted all
servers within his company over the weekend. Yesterday UniData suddenly
didn't work anymore. I could log in to the database, but any command,
whether Write, Select or catalogued subroutine would stop dead in its track.
There was no error message, no indication what could have gone wrong.
UniObjects had no time-out, the application hung for hours.

I telneted into the database and many users got the unknown user error, I
just found one user that allowed me to log in. I ran a few commands and that
worked.

My hunch is that a Windows update changed NT-Authentication and UniData
didn't like it. Poking through the logs, I see in the Windows security log
two entries for every UniData login, one success and one failure:
The first a success audit:
A trusted logon process has registered with the Local Security Authority.
This logon process will be trusted to submit logon requests. 
 Logon Process Name:    \udapi_server.exe

Then a failure audit:
The logon to account: HHC-Unidata
 by: MICROSOFT_AUTHENTICATION_PACKAGE_V1_0
 from workstation: HORIZONSERV4
 failed. The error code was: 3221225572

The error code means: 32212255720    The specified user does not exist.

This behavior started already last year, and even now that everything works
again. 

Does anyone have ideas or similar experiences?


Martin Scholl
18910 New Hampshire Ave
Brinklow, MD 20862
Phone: 301-924-5537
Cell: 301-613-9572
[email protected]
www.HIPAAsuite.com


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