Home » RDBMS Server » Networking and Gateways » Fatal NI connect error 12638, connecting to: (oracle 9i 9.2)
Fatal NI connect error 12638, connecting to: [message #339971] Sun, 10 August 2008 09:40 Go to next message
mandygrewalindia
Messages: 14
Registered: February 2008
Location: india
Junior Member
hi can anyone help me with this problem from couple of daz
I'm getting this information in sqlnet.log file lying at
D:\oracle\oradata\database\

Fatal NI connect error 12638, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=BEQ)(PROGRAM=oracle)(ARGV0=oraclemaninder)(ARGS='(DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))')) (CONNECT_DATA=(SID=maninder)(CID=(PROGRAM=d:\oracle\ora92\bin\ORACLE.EXE)(HOST=SAI-E6C10175EE4)(USER=OraUser))))

VERSION INFORMATION:
TNS for 32-bit Windows: Version 9.2.0.1.0 - Production
Oracle Bequeath NT Protocol Adapter for 32-bit Windows: Version 9.2.0.1.0 - Production
Time: 10-AUG-2008 12:53:37
Tracing not turned on.
Tns error struct:
nr err code: 0
ns main err code: 12638
TNS-12638: Credential retrieval failed
ns secondary err code: 0
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0

thankx
Re: Fatal NI connect error 12638, connecting to: [message #339972 is a reply to message #339971] Sun, 10 August 2008 09:52 Go to previous messageGo to next message
BlackSwan
Messages: 22712
Registered: January 2009
Senior Member
http://www.orafaq.com/forum/t/88153/0/
Please read & FOLLOW the Posting Guidelines as stated in URL above
Re: Fatal NI connect error 12638, connecting to: [message #339978 is a reply to message #339971] Sun, 10 August 2008 11:52 Go to previous messageGo to next message
Michel Cadot
Messages: 58915
Registered: March 2007
Location: Nanterre, France, http://...
Senior Member
Account Moderator
OS?
Version?
Edition?
Service Pack?
What command did you do when you encountered this error?

Regards
Michel
Re: Fatal NI connect error 12638, connecting to: [message #340231 is a reply to message #339971] Tue, 12 August 2008 01:02 Go to previous messageGo to next message
Mohammad Taj
Messages: 2412
Registered: September 2006
Location: Dubai, UAE
Senior Member

http://dbataj.blogspot.com/2007/01/ora-12638-credential-retrieval-failed.html
Re: Fatal NI connect error 12638, connecting to: [message #595115 is a reply to message #339971] Fri, 06 September 2013 15:07 Go to previous messageGo to next message
cestmoi
Messages: 1
Registered: September 2013
Junior Member
Hello,

Just want to throw my two cents...

I also received the same 'fatal error' message: Fatal NI connect error 12638, connecting to:

Following the suggestion of changing the SQLNET.ORA which can be found on the client Windows if you do a search, you'll see:

SQLNET.AUTHENTICATION_SERVICES = (NTS)

I tried changing it to

SQLNET.AUTHENTICATION_SERVICES = (NONE), but Windows won't allow me to overwrite, so i simply moved this file out of the directory path and voila, it worked!

Just so you know, my issue was this: I get the Fatal message when my Crystal Reports app ver 2010 tries to log into one of our Oracle DB, but when I use Oracle Developer app using the same credentials, it would work fine or if I use CMD prompt to log into the ORA db it would be ok.
Re: Fatal NI connect error 12638, connecting to: [message #595123 is a reply to message #595115] Sat, 07 September 2013 02:04 Go to previous message
John Watson
Messages: 4508
Registered: January 2010
Location: Global Village
Senior Member
Welcome to the forum. Please read our OraFAQ Forum Guide and please read How to use [code] tags and make your code easier to read

It is always good to see someone whose first message is an answer, not a question.

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