ORA-12154: TNS:could not resolve... - sql plus works, env vars are set...

Hi,
I am getting this error message in my ASP.Net apps (namespace Oracle.DataAccess.Client) and any app that tries to use the Oracle Provider for OLE DB.
Error:
ORA-12154: TNS:could not resolve the connect identifier specified
Here is what I do know:
- My ORACLE_HOME is set to C:\oracle\product\11.1.0\client_1\
- My path has C:\oracle\product\11.1.0\client_1\network\admin;C:\oracle\product\11.1.0\client_1\bin;
- I installed Oracle Client 11g, previously 10g was working but one of the devs wanted to upgrade
- I can connect using sqlplus user/pass@tnsname
- I can test tns entries successfully in Net Manager
Here is what I don't know:
- When using OLE connections, why does Oracle Provider for OLE DB not pick up on the environment variables - sql plus seems to, that's why it works.
- In ASP.Net, why does the connection object from Oracle.DataAccess.Client not pick up the correct environment variables?
- How do the Oracle drivers pick up the location of the TNS names?
Thanks,
Michael
Edited by: user2750352 on 04-May-2009 07:51

Hi,
What "environment variables" are you referring to that you have set? You shouldnt have to set any, unless you're talking about TNS_ADMIN just to avoid having to configure multiple TNSNames.ora's if you have multiple homes.
Your PATH doesnt need to include OH\network\admin, but thats not hurting anything. PATH is for dll loading, not for finding config files.
Do you still have 10g installed? When you connect using sqlplus user/pass@tnsname, are you using 11g sqlplus? Or is that coming from the 10g client? Multiple homes arent aware of each other, so if you have a 10g home and an 11g home, you'd have to configure tnsnames.ora for both (or use tns_admin).
As far as I know, the client software picks up tnsnames.ora by checking:
1) the local working directory
2) the tns_admin directory
3) the network\admin directory of the client home being used.
Hope it helps,
Greg

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      Instance "mydb", status READY, has 1 handler(s) for this service...
    Service "orcl_un" has 1 instance(s).
      Instance "orcl", status BLOCKED, has 1 handler(s) for this service...
    The command completed successfully
    [oracle@localhost ~]$ tnsping mydb
    TNS Ping Utility for Linux: Version 11.2.0.1.0 - Production on 05-JAN-2014 09:27:54
    Copyright (c) 1997, 2009, Oracle.  All rights reserved.
    Used parameter files:
    /u01/home/oracle/product/11.2.0/db_1/network/admin/sqlnet.ora
    Used TNSNAMES adapter to resolve the alias
    Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = mydb_un)))
    OK (0 msec)
    [oracle@localhost ~]$ tnsping orcl
    TNS Ping Utility for Linux: Version 11.2.0.1.0 - Production on 05-JAN-2014 09:28:03
    Copyright (c) 1997, 2009, Oracle.  All rights reserved.
    Used parameter files:
    /u01/home/oracle/product/11.2.0/db_1/network/admin/sqlnet.ora
    Used TNSNAMES adapter to resolve the alias
    Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl_un)))
    OK (0 msec)
    [oracle@localhost admin]$ more listener.ora
    # listener.ora Network Configuration File: /u01/home/oracle/product/11.2.0/db_1/network/admin/listener.ora
    # Generated by Oracle configuration tools.
    LISTENER =
      (DESCRIPTION_LIST =
        (DESCRIPTION =
          (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
          (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    SID_LIST_LISTENER =
      (SID_LIST =
        (SID_DESC =
          (GLOBAL_DBNAME = mydb_un)
          (ORACLE_HOME = /u01/home/oracle/product/11.2.0/db_1)
          (SID_NAME=mydb)
        (SID_DESC =
          (GLOBAL_DBNAME = orcl_un)
          (ORACLE_HOME = /u01/app/oracle/product/11.2.0/dbhome_1)
          (SID_NAME = orcl)
    ADR_BASE_LISTENER = /u01/app/oracle
    [oracle@localhost admin]$ more tnsnames.ora
    # tnsnames.ora Network Configuration File: /u01/home/oracle/product/11.2.0/db_1/network/admin/tnsnames.ora
    # Generated by Oracle configuration tools.
    MYDB =
      (DESCRIPTION =
        (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
        (CONNECT_DATA =
          (SERVER = DEDICATED)
          (SERVICE_NAME = mydb_un)
    ORCL =
      (DESCRIPTION =
        (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
        (CONNECT_DATA =
          (SERVER = DEDICATED)
          (SERVICE_NAME = orcl_un)
    [oracle@localhost ~]$ rman target sys/engineer@mydb auxiliary sys/engineer@orcl
    Recovery Manager: Release 11.2.0.1.0 - Production on Sun Jan 5 09:30:59 2014
    Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.
    RMAN-00571: ===========================================================
    RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
    RMAN-00571: ===========================================================
    RMAN-00554: initialization of internal recovery manager package failed
    RMAN-04005: error from target database:
    ORA-12154: TNS:could not resolve the connect identifier specified
    [oracle@localhost ~]$
    Please let me know why I am getting this error if everything is fine above.
    Regards,
    Michel

    Here's your issue
    (HOST=localhost.localdomain)
    If you are going to use "localhost" at least fake it by adding an entry in your /etc/hosts files
    Example ( add to both servers so they can see each other )
    192.168.0.20               primary.localdomain   primary
    192.168.0.21               standby.localdomain   standby
    Does the "hostname" return localhost.localdomain? Setup something so RMAN has something to connect to.
    The "/etc/hosts" file must contain a fully qualified name for the server.
    <IP-address> <fully-qualified-machine-name> <machine-name>
    localhost.localdomain is 127.0.0.1, you don't want that.
    Best Regards
    mseberg

  • About ORA-12154:  TNS:could not resolve service name

    Hi~
    i have a problem about Oracle Form/Report connecting
    when i keyin UserName/PassWord & Service Name(like myInstance_172.22.22.22) connecting to Instance,connection failed(Form/Report),error as follow
    ORA-12154: TNS:could not resolve service name
    but when i try this(the same userName/PassWord & Service String) on the SQL*Plus or DBA(OEM),it can successfully connection to Instance.
    what should i to do to resolve this problem?
    Thanks.

    Robson
    "TNS:could not resolve service name" means the tnsnames.ora file doesn't have the entry for your service name.
    There are couple of situations where this error can come even if you see the sqlplus works
    Please check the follwoing
    1. You may be having morethan one tnsnames.ora file in your system and the entry doesn't exist in any one of them , which is unfortunatel used by Forms/Reports.
    In your Oracle_Home for Forms / Reports, serach for the folder Network/admin or Net80/Admin and see the tnsnmaes.ora file there. Ensure you have the proper entry for your referred tnsname
    2. If your Reports server / client is in different machines, ensure both the machne's tnsnames.ora files have the entry
    Alternatively, you canedit the registry of your Oracle_Home to add another variable call ed TNS_ADMIN and give your directory where theproper tnsnames.ora
    is available
    Thanks
    The Oracle Reports Team

  • ORA-12154: TNS:could not resolve the connect identifier

    I am simply trying to move a site from a Windows 2003 32bit server to a Windows 2008 R2 64-bit. The database was on and is remaining on the 2008 server. Trying to run the new site results in:
    ORA-12154: TNS:could not resolve the connect identifier
    This error pops up more than a few times in the forums but do not seem unique to my situation where I know the connection string works fine from another server. Any insights?

    Working
    Microsoft Windows [Version 5.2.3790]
    (C) Copyright 1985-2003 Microsoft Corp.
    C:\>SET
    ALLUSERSPROFILE=C:\Documents and Settings\All Users
    APPDATA=C:\Documents and Settings\Cherie.Jarvis\Application Data
    ARCGISHOME=D:\Program Files\ArcGIS\
    CLIENTNAME=ZEKIAH-PC463
    ClusterLog=C:\WINDOWS\Cluster\cluster.log
    CommonProgramFiles=C:\Program Files\Common Files
    CommonProgramFiles(x86)=C:\Program Files (x86)\Common Files
    COMPUTERNAME=CFLGIS1
    ComSpec=C:\WINDOWS\system32\cmd.exe
    FP_NO_HOST_CHECK=NO
    HOMEDRIVE=C:
    HOMEPATH=\Documents and Settings\Cherie.Jarvis
    LOGONSERVER=\\BATMAN
    NUMBER_OF_PROCESSORS=4
    ORACLE_HOME=D:\Ora11g\Administrator\product\11.1.0\db_1
    OS=Windows_NT
    Path=D:\Program Files\ArcGIS\ArcSDE\ora11gexe\bin;D:\Ora11g\Administrator\produc
    t\11.1.0\db_1\bin;D:\Ora11g\Administrator\product\11.1.0\db_1;D:\Ora11g_Client32
    \product\11.1.0\client_3;D:\Ora11g_Client32\product\11.1.0\client_3\bin;C:\WINDO
    WS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files (x86)\Microsoft
    SQL Server\90\Tools\binn\;C:\Program Files\ArcGIS\ArcSDE\ora11gexe\bin
    PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH
    PROCESSOR_ARCHITECTURE=AMD64
    PROCESSOR_IDENTIFIER=EM64T Family 6 Model 23 Stepping 10, GenuineIntel
    PROCESSOR_LEVEL=6
    PROCESSOR_REVISION=170a
    ProgramFiles=C:\Program Files
    ProgramFiles(x86)=C:\Program Files (x86)
    PROMPT=$P$G
    PYTHONPATH=D:\Program Files\ArcGIS\bin
    SDEFORCEXDR=1
    SDEHOME=C:\Program Files\ArcGIS\ArcSDE\ora11gexe\
    SESSIONNAME=RDP-Tcp#461
    SystemDrive=C:
    SystemRoot=C:\WINDOWS
    TEMP=C:\DOCUME~1\CHERIE~1.JAR\LOCALS~1\Temp\1
    TMP=C:\DOCUME~1\CHERIE~1.JAR\LOCALS~1\Temp\1
    TNS_ADMIN=D:\Ora11g\Administrator\product\11.1.0\db_1\NETWORK\ADMIN
    USERDNSDOMAIN=CFLHD.LOCAL
    USERDOMAIN=CFLHD
    USERNAME=Cherie.Jarvis
    USERPROFILE=C:\Documents and Settings\Cherie.Jarvis
    VS90COMNTOOLS=D:\Program Files\Microsoft Visual Studio 9.0\Common7\Tools\
    windir=C:\WINDOWS
    C:\Documents and Settings\Cherie.Jarvis>
    Not Working
    Microsoft Windows [Version 6.1.7600]
    Copyright (c) 2009 Microsoft Corporation. All rights reserved.
    C:>set
    AGSSERVERJAVA=C:\Program Files (x86)\ArcGIS\Server10.0\
    ALLUSERSPROFILE=C:\ProgramData
    ANT_HOME=D:\Software\apache-ant-1.8.1
    APPDATA=C:\Users\cherie.jarvis\AppData\Roaming
    CLIENTNAME=ZEKIAH-PC463
    CommonProgramFiles=C:\Program Files\Common Files
    CommonProgramFiles(x86)=C:\Program Files (x86)\Common Files
    CommonProgramW6432=C:\Program Files\Common Files
    COMPUTERNAME=CFLGIS2
    ComSpec=C:\Windows\system32\cmd.exe
    FP_NO_HOST_CHECK=NO
    HOMEDRIVE=C:
    HOMEPATH=\Users\cherie.jarvis
    JAVA_HOME=D:\Program Files\Java\jdk1.6.0_22
    LOCALAPPDATA=C:\Users\cherie.jarvis\AppData\Local
    LOGONSERVER=\\BATMAN
    NUMBER_OF_PROCESSORS=16
    ORACLE_HOME=D:\ORA11G\Administrator\product\11.1.0\db_1
    OS=Windows_NT
    Path=D:\app\Zekiah\product\11.1.0\client_2;D:\app\Zekiah\product\11.1.0\client_2
    \bin;D:\Program Files (x86)\PHP\;D:\Ora11g_Client32\product\11.1.0\client_1\bin;
    D:\Ora11g\administrator\product\11.1.0\db_1\bin;C:\Windows\system32;C:\Windows;C
    :\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;D:\Program F
    iles\ArcGIS\ArcSDE\ora11gexe\bin;D:\Program Files (x86)\MySQL\MySQL Server 5.1\b
    in;D:\Program Files\Java\jdk1.6.0_22\bin;D:\Software\apache-ant-1.8.1\bin;D:\Pro
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    PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
    PHPRC=D:\Program Files (x86)\PHP\
    PROCESSOR_ARCHITECTURE=AMD64
    PROCESSOR_IDENTIFIER=Intel64 Family 6 Model 44 Stepping 2, GenuineIntel
    PROCESSOR_LEVEL=6
    PROCESSOR_REVISION=2c02
    ProgramData=C:\ProgramData
    ProgramFiles=C:\Program Files
    ProgramFiles(x86)=C:\Program Files (x86)
    ProgramW6432=C:\Program Files
    PROMPT=$P$G
    PSModulePath=C:\Windows\system32\WindowsPowerShell\v1.0\Modules\
    PUBLIC=C:\Users\Public
    SDEHOME=D:\Program Files\ArcGIS\ArcSDE\ora11gexe\
    SESSIONNAME=RDP-Tcp#0
    SystemDrive=C:
    SystemRoot=C:\Windows
    TEMP=C:\Users\CHERIE~1.JAR\AppData\Local\Temp\2
    TMP=C:\Users\CHERIE~1.JAR\AppData\Local\Temp\2
    USERDNSDOMAIN=CFLHD.LOCAL
    USERDOMAIN=CFLHD
    USERNAME=Cherie.Jarvis
    USERPROFILE=C:\Users\cherie.jarvis
    VISUALSVN_SERVER=D:\Program Files (x86)\VisualSVN Server\
    windir=C:\Windows

  • ORA-12154: TNS:could not resolve the connect identifier speci

    Getting this Error on our new windows 7 64bit OS
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    <null>
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    Hi,
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  • ORA-12154: TNS:could not resolve the connect identifier specified Error in Integration Service Catalogs

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  • Frmcmp_batch.sh ORA-12154: TNS:could not resolve the connect identifier spe

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