ORA-12154 Error - NET8 Connection Tester Works Though

I have copied over a tnsnames.ora file from another machine I know that works fine. It has one Oracle home.
When I try to connect via SQLPlus or Oracle DBA studio, I get told that it cannot resolve the service name and the ORA-12154 error. However, when I go into Net8 Assistant and test the connection, it work without an issue no matter what login/password I use, from a developers to the system login and password.
Any ideas?

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Sporadic ORA-12154 errors when connecting

We are occasionally receiving "ORA-12154: TNS:could not resolve service name" errors in all of the applications running on our W2K web server connected to an 8.1.6 database on a Sun server. Does anyone have any idea what is causing this and how we can prevent it?

Try using an IP address in your tnsnames.ora instead of a machine name for a tns entry.

ORA-12154: Error when connecting to asm instance

hi all, I am now facing new problem with asm of clusterware, I failed to connect to asm instance, there is how I did it:
sqlplus /nologSQL*Plus: Release 11.2.0.1.0 Production on Wed Jul 7 04:58:52 2010
Copyright (c) 1982, 2010, Oracle. All rights reserved.
SQL> connect sys@+ASM as sysasm
Enter password:
ERROR:
ORA-12154: TNS:could not resolve the connect identifier specified
I consider listener is correct configed.
lsnrctl statusLSNRCTL for 64-bit Windows: Version 11.2.0.1.0 - Production on 07-JUL-2010 08:51:49
Copyright (c) 1991, 2010, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for 64-bit Windows: Version 11.2.0.1.0 - Produ
ction
Start Date 05-JUL-2010 22:12:29
Uptime 1 days 6 hr. 39 min. 23 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File E:\app\11.2.0\grid\network\admin\listener.ora
Listener Log File e:\app\11.2.0\grid\log\diag\tnslsnr\rac1\listener\aler
t\log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\LISTENERipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.0.110)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.0.112)(PORT=1521)))
Services Summary...
Service "+ASM" has 1 instance(s).
Instance "+asm2", status READY, has 1 handler(s) for this service...
Service "itpub" has 1 instance(s).
Instance "itpub2", status READY, has 1 handler(s) for this service...
Service "itpubXDB" has 1 instance(s).
Instance "itpub2", status READY, has 1 handler(s) for this service...
The command completed successfully
How to resolve the promblem? Best regards..

thank you for you kind.. I forgot it... but after I modify tnsname.ora, Error number changed..
tnsname.ora:
# tnsnames.ora Network Configuration File: E:\oracle\product\11.2.0\dbhome_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
ITPUB =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = rac-cluster-scan)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = itpub)
+ASM =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = rac-cluster-scan)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = +ASM)
*>sqlplus /nolog*
SQL*Plus: Release 11.2.0.1.0 Production on Wed Jul 7 12:50:07 2010
Copyright (c) 1982, 2010, Oracle. All rights reserved.
SQL> connect sys@+asm as sysasm
Enter password:
ERROR:
ORA-12514: TNS:listener does not currently know of service requested in connect
descriptor
SQL>
tnsping +asmTNS Ping Utility for 64-bit Windows: Version 11.2.0.1.0 - Production on 07-JUL-2
010 12:51:09
Copyright (c) 1997, 2010, Oracle. All rights reserved.
Used parameter files:
E:\oracle\product\11.2.0\dbhome_1\network\admin\sqlnet.ora
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = rac-clus
ter-scan)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = +as
m)))
OK (20 msec)

ORA-12154 Error After Install of Enterprise Manager

I have a new new laptop with minimal software installed. Everything was fine and I was able to connect to 4 different Oracle 9i databases.
This morning I installed Oracle Enterprise Manager (10g) and now I get the dreaded ORA-12154 error.
I now find a copy of TNSNAMES.ORA in three places. I have copied the correct version to the two new 10G locations and I have verified that all three copies of TNSNAMES.ORA and SQLNET.ORA are correct and identical.
Do anybody have any idea what else could be wrong?

I am certain the TNSNAMES.ORA file is fine as it is "pushed" from a central IT department. I have compared it to the one on a second computer (which has only 9i installed) in my office and they are identical.
I examined the Oracle 9i directories and there was no LISTENER.ORA anywhere. On the 9i only computer the command - C:\>dir listener.ora /s /p executed in a DOS window returned no files.
Everything was working fine until I installed Enterprise Manager 10g (10.2.0.2.1).
I have TOAD installed and it connects to both of the 9i development and production databases, so I know the TNSNAMES.ORA is okay.
It woudl seem that there is a conflict between 10g and 9i Developer/2000.

Ora 12154 error when trying to add a database to VS Server Explorer

Hi Everyone,
I get the Ora 12154 error when trying to add a database to VS Server Explorer.
How do I get around this problem.
The database service is running and I can connect to the database with pl/sql.
I can also tnsping the database and that is also ok.
Looks like a problem with the odp.net software.
I am running the 32 bit Oracle 11g on a Windows7 Home Premium 64 bit PC.
I am new to this stuff so please help me step by step.
Thanks.
Emad

Hi J. B.
I have a question related to this. After you told me about the //host:1521/database alias I tried it in a VB 2008 program and it worked and returned data. At least I know that it can be used in a VB program without issues. I just now need to be able to add a connection with the Server Explorer.
Anyway here is the VB coding I used. I'm new to this and still learning:
Imports Oracle.DataAccess.Client ' Visual Basic ODP.NET Oracle managed provider
Public Class Form1
' String to connect to the database.
Dim strConnectionString As String = _
"Data Source=//emad-pc:1521/emadeva;User ID=scott;Password=tiger;" '
' Associate the connection string with a connection object.
Dim objOracleConnection As New OracleConnection(strConnectionString)
' SQL query for returning data rows.
Dim strSqlQuery As String = _
"Select dname, deptno " & _
"From dept " & _
"Where deptno = 10" '
' Command object to make this query work.
Dim objOracleCommand As New OracleCommand(strSqlQuery, objOracleConnection)
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
' Identify what type of command is being used.
objOracleCommand.CommandType = CommandType.Text
Try
objOracleConnection.Open()
' Set up a Data Reader and load it with data.
Dim objOracleDataReader As OracleDataReader = _
objOracleCommand.ExecuteReader()
objOracleDataReader.Read()
' Convert the department number to a string.
lblDepartmentNumberFromOracle.Text = _
CStr(objOracleDataReader.Item("deptno"))
Catch ex As Exception
MessageBox.Show(ex.Message, "Error")
End Try
End Sub
End Class
I still want to thank you for the help you are providing.
Truly,
Emad

Ora 12154 error help needed

Hi,
I am a newbie in oracle forms. I have installed oracle database 10gr2 on windows xp in c directory. In D drive i have installed oracle developer suite 10g. When i try to connect database from developer suite i receive ORA 12154 error.
Do i need to change tnsnames.ora in developer suites 'D' directory or in database'C' directory.
Please explain me in steps so that i can configure developer suite.
Thank You

Forms will use its own Tnsnames.ora file so create alias for it
Run NetCA from
START > PROGRAMS > ORACLE - Oracle HOME name > Configuration and Migration tools > Net Configuration Assistant
and create Alias for Local naming
also make sure the Listener and Database is up and running
Baig,
[My Oracle Blog|http://baigsorcl.blogspot.com/]

ORA-12154 error when trying to connect to Oracle 11g DB from Excel 2010

All,
I am trying to set up Excel 2010 64-bit to connect to an Oracle 11g database, but am having some trouble due to an "ORA-12154 could not resolve the connect identifier specified" error. I am able to TNSping the SID name, as well as connect to SQLplus. The TNS entry works, and the Oracle Home is in the right spot. I am even able to put the full connection string in the "Data Source" field when creating a data link in Excel and have it connect to the DB. But I would like to be able to create one that used the SID rather than the full connection string, as other users will have to use this. The developer behind the Excel solution created a number of .odc files to connect to various databases, so this gives extra weight behind figuring out how to connect via a SID rather than a full connection string. Any suggestions?

user10832104 wrote:
All,
I am trying to set up Excel 2010 64-bit to connect to an Oracle 11g database, but am having some trouble due to an "ORA-12154 could not resolve the connect identifier specified" error. I am able to TNSping the SID name, as well as connect to SQLplus. The TNS entry works, and the Oracle Home is in the right spot. I am even able to put the full connection string in the "Data Source" field when creating a data link in Excel and have it connect to the DB. But I would like to be able to create one that used the SID rather than the full connection string, as other users will have to use this. The developer behind the Excel solution created a number of .odc files to connect to various databases, so this gives extra weight behind figuring out how to connect via a SID rather than a full connection string. Any suggestions?
If you are able to connect with sqlplus, then this really becomes a question of how to define a data connection in Excel.
But after quickly googling ..
In excel ...
"Data" tab
"from other sources"
"from data connection wizard"
select ODBC DSN
On data link properties, select the "connection" tab
select "Use Data Source Name" and hit the drop-down
select a dsn that you had previously set up to point to the oracle database.
Anyway, that looks like how it is supposed to be done. I'm getting a dll initialization error. Probably due to the fact I have both 32-bit and 64-bit oracle clients, and windows never handles that very gracefully. But then Windows never graceffully handles anything that isn't MicroSoft. To paraphrase Forest Gump, "My momma always said Windows was like a box of chocolates. You never know what you're going to get."
In any event, the error you report means it was actually tying to look it up in tnsnames, but what you supplied wasn't found there. That can also be a big issue when dealing with MS products, because they don't use the same terminology, so lead people into entering something other than what Oracle expects. Are you referencing an ODBC DSN? If so, have you tested that apart from Excel?

Error ORA-12154 trying to connect with instant client 11g / LDAP on Ubuntu

Hello,
I have successfully installed instant client 11.2.0.2 and sqlplus on my Ubuntu 11.04 workstation. I am able to successfully connect to DB's defined in tnsnames.ora, but when the resolution is (or should be) by LDAP, I get error
ORA-12154: TNS:could not resolve the connect identifier specified
Note: while it's fine for testing, it's not a viable option to setup all the DB's defined in the OID in tnsnames.ora - I need to use LDAP.
My setup is as follows:
Install folder: /opt/oracle/instantclient_11_2
TNS_ADMIN=/opt/oracle/instantclient_11_2/
sqlnet.ora
NAMES.DIRECTORY_PATH=(TNSNAMES,LDAP)
I am certain that tnsnames.ora and ldap.ora are valid, as I can connect successfully on another machine with the full client installed using the same files.
I tried to setup tracing in sqlnet.ora as follows
TRACE_LEVEL_CLIENT = SUPPORT
TRACE_DIRECTORY_CLIENT = /tmp
TRACE_FILE_CLIENT = sqlnet.trc
but not trace file gets generated in /tmp - am I doing something wrong ? (Note, I also tried to set DIAG_ADR_ENABLED=OFF as suggested by Laurenz Albe in Instant client don't work trace but that did not help)
I checked DocID=359206.1 but I don't think that applies as I'm on 11g.
Hope someone can help. Thanks in advance !

rgoold, you are a star ! I should have thought about line endings of course. Many thanks for your suggestion, that fixed the problem.
# file *.ora
ldap.ora: ASCII text, with CRLF line terminators
sqlnet.ora: ASCII text, with CRLF line terminators
# dos2unix *.ora
dos2unix: converting file ldap.ora to UNIX format ...
dos2unix: converting file sqlnet.ora to UNIX format ...
# ./sqlplus -L user@database
SQL*Plus: Release 11.2.0.2.0 Production on Mon Sep 5 15:26:16 2011
Copyright (c) 1982, 2010, Oracle. All rights reserved.
Enter password:
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL>
WOHOOOOO !!! :-)

ORA-12154 error connecting CR 2008 to Oracle XE on Windows 7

I have Crystal 2008 SP3 running on Windows 7. I have Oracle Database Express Edition installed and running. Using the DirectData CR Oracle ODBC Driver 5.1 I test connect fine to Oracle but when I try to use Database Expert to connect to my Oracle database I fail to connect.
The error I get is Failed to open the connection. Details: ORA-12154: TNS:could not resolve the connect identifier specified. [Database Vendor Code: 12154]. I've spent a lot of time here trolling for information. My TNSnames.ora file appears to be correctly formatted but I'm not sure if it has the correct information in it. I checked my Path and that may be the problem but I am not technical enough to know what to put there so that this 32-bit driver is the first in the list. It's the driver in Windows/SysWOW64. I just need to be able to run a SQL statement in Oracle and create RPTs in CR - not be an OS Expert. Any help would be greatly appreciated.
TNSNAMES.ORA
XE =
(DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = Owner-VAIO)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = XE)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
    (CONNECT_DATA =
      (SID = PLSExtProc)
      (PRESENTATION = RO)
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
    (CONNECT_DATA =
      (SID = CLRExtProc)
      (PRESENTATION = RO)
PATH
PATH=C:\Program Files\Common Files\Microsoft Shared\Windows Live;C:\Program File
s (x86)\Common Files\Microsoft Shared\Windows Live;C:\oraclexe\app\oracle\produc
t\10.2.0\server\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\W
indows\System32\WindowsPowerShell\v1.0\;C:\Program Files\WIDCOMM\Bluetooth Softw
are\;C:\Program Files\WIDCOMM\Bluetooth Software\syswow64;C:\Program Files (x86)
\Common Files\Roxio Shared\10.0\DLLShared\;C:\Program Files (x86)\Common Files\R
oxio Shared\DLLShared\;C:\Program Files (x86)\Common Files\Intuit\QBPOSSDKRuntim
e;C:\Program Files (x86)\QuickTime\QTSystem\;C:\Program Files (x86)\Windows Live
\Shared

Hello,
This should work, XE is not lsited in our supported platforms PDF but it's still 10.2 which is supported.
There are more tools you can use to debug, third party Connection tests and ProcessMonitor as well as our database logging dll but if you are running out of time I suggest you purchase a single case and a Rep will contact you directly to resolve the problem.
To get a single support case got to:
http://store.businessobjects.com/store/bobjamer/DisplayProductByTypePage&parentCategoryID=&categoryID=38156200
And No, the ORA file should be in the that folder.
Thanks again
Don

ORA- 12154 Error: while php connect to oracle?

While I use OCILogon connect to Oracle9i,show error message as follow:
Warning: ociopen_server: Error while trying to retrieve text for error ORA-12154 in /var/www/html/inc/sev.inc.php on line 57
most of people think of its tnsname' problem,but I modify my tnsnames.ora,and sqlplus can connect with correct username and password.
page source as follow:
<?
function db_connect()
//putenv("ORACLE_SID=test");
//putenv("NLS_LANG=SIMPLIFIED CHINESE.ZHS16CGB231280");
putenv("ORACLE_HOME=/home/oracle/OraHome1");
$connect = OCILogon("system","manager","test");
if ($connect)
return $connect;
else
return -1;
?>
server Env: linux red hat 8.0,apache 2.0.44,php4.3.1,oracle9.2.0
please! Thank in advance!

Do you have more than ONE oracle homes created?
Does your PATH env. variable correctly references the ORACLE_HOME directory?

I got the error ORA-12154 trying to connect my app but not with the SQLplus

Hello! i need your help,
I have a client (Win XP SP2) and i'm trying to connect to the database in the server (Windows 2003, Oracle 10G) using the SQL plus, this is ok, but i try to do it throught the application developed in Developer 6i and i cannot, i got the error: ORA-12154 TNS:could not resolve service name. I tried to solve it by setting the env. var TNS_ADMIN and i still have the same error.
Could anyone help me?, please

Hi,
Check for following file TNSNAMES.ORA at location;
C:\<Forms-directory>\NET80\ADMIN
See, if your service name is added to your file. If not then add a new entry like;
gsm.world =
(DESCRIPTION =
(ADDRESS = (COMMUNITY = tcp)(PROTOCOL = TCP)(Host = 10.0.1.22)(Port = 1521))
(CONNECT_DATA = (SID = gsm))
Where:
gsm.world = your service through which you connect to databse.
Host = ip address of machine where oracle server is running.
sid = name of your database
If you already have entry of service in TNSNAMES.ora file then paste you service here as is did , so that we can check because the error you are facing is only due to service problem. Please update........

Gives ORA-12154 error, when trying to connect as sysdba

Hi Gurus,
I am new to oracle. I have successfully install Oracle Database 10gR2 on RHEL4.
Everyghing is working fine.
I found that loging through sqlplus not success as sysdba.(ORA-12154) But as a normal user I can loging through sqlplus. Anyway I can loging as sysdba through emctl console.
Can anyone help on this pls. Urgent.......................

You're welcome.
I dont know how this happened Probably your old password had some special characters within it, that's why I wanted to know if connecting without password did work. Then I would have advised you to change your password (avoiding special characters...).

Power Bi for o365 - Odata connection test worked but "The server encountered an error processing the request. See server logs for more details". Port 8051? Authority\System

We set up the Data Management Gateway and created a new data source (odata to SQL via sqL user)
Did a connection test and it was successful!
Tried the URL (maybe it needs more):
https://ourdomain.hybridproxy.powerbi.com/ODataService/v1.0/odatatest
That resolves to some :8051 port address and then spits out this message:
The server encountered an error processing the request. See server logs for more details.
I checked and the data management gateway is running.
Does that 8051 port need to be opened on our firewall for this server? How can I confirm that is the issue.. I see no event on the server indicating this is the issue?
I am seeing this event:
Login failed for user 'NT AUTHORITY\SYSTEM'. Reason: Failed to open the explicitly specified database 'PowerBiTest'. [CLIENT: IP of the Server]

O365,
Is this still an issue?
Thanks!
Ed Price, Azure & Power BI Customer Program Manager (Blog,
Small Basic,
Wiki Ninjas,
Wiki)
Answer an interesting question?
Create a wiki article about it!

If your getting the ora-12154 error...

If you have followed the directions provided and swear you have done everything right... then try this.
Check to make sure the tnsnames.ora and sqlnet.ora files are actually .ORA files. I recently started a new job and was tasked with getting instant client working with a VB app. Anyhow, I installed instant client and added the enviroment variables etc etc. I kept getting the 12154 error when testing a sqlplus connection and I couldn't understand why.
Well since this was a new computer I was working on, I hadn't change the setting when viewing files so it was hiding the file type from me and all I could see was "tnsnames.ora" when the file was really "tnsnames.ora.txt". A day later I figured it out and felt pretty stupid!
Windows Explorer | Tools | Folder Options | View | Uncheck "Hide extensions for known file types"
Check those file types people...

I think you had done a "terrific" job helping novices like me to check/fix the error with the hidden tnsnames.ora.txt extension. I think it is very useful information.
Thank a lot.

Sql@loader-704 and ORA-12154: error messages when trying to load data with SQL Loader

I have a data base with two tables that is used by Apex 4.2. One table has 800,000 records . The other has 7 million records
The client recently upgraded from Apex 3.2 to Apex 4.2 . We exported/imported the data to the new location with no problems
The source of the data is an old mainframe system; I needed to make changes to the source data and then load the tables.
The first time I loaded the data i did it from a command line with SQL loader
Now when I try to load the data I get this message:
sql@loader-704 Internal error: ulconnect OCISERVERATTACH
ORA-12154: tns:could not resolve the connect identifier specified
I've searched for postings on these error message and they all seem to say that SQL Ldr can't find my TNSNAMES file.
I am able to connect and load data with SQL Developer; so SQL developer is able to find the TNSNAMES file
However SQL Developer will not let me load a file this big
I have also tried to load the file within Apex (SQL Workshop/ Utilities) but again, the file is too big.
So it seems like SQL Loader is the only option
I did find one post online that said to set an environment variable with the path to the TNSNAMES file, but that didn't work..
Not sure what else to try or where to look
thanks

Hi,
You must have more than one tnsnames file or multiple installations of oracle. What i suggest you do (as I'm sure will be mentioned in ed's link that you were already pointed at) is the following (* i assume you are on windows?)
open a command prompt
set TNS_ADMIN=PATH_TO_DIRECTOT_THAT_CONTAINS_CORRECT_TNSNAMES_FILE (i.e. something like set TNS_ADMIN=c:\oracle\network\admin)
This will tell oracle use the config files you find here and no others
then try sqlldr user/pass@db (in the same dos window)
see if that connects and let us know.
Cheers,
Harry
http://dbaharrison.blogspot.com

ORA-12154 Error - NET8 Connection Tester Works Though

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