TNS: no such protocol, TNS: no listener

Hi OTn,
Where can I use the port no. 9000 and Sockets as protocol, in the form server setup?
I am no able to the provision for typing the above said. What mistake, I have made!?
And when I use the Start >Net8 Easy Config, for testing the connection, I used to get repeated errors like,
TNS: no listener
TNS: no such protocol adaptor
TNS: could not resolve the servise name
What is the remedy for this?
Pls help.
Thank you,
Maha ([email protected])
null

Start the database listener on your database server: lsnrctl start.

Similar Messages

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    getting a ORA 12222 TNS : no such protocol adopter found
    after installing patch 6 over existing oracle 9i AS 1.0.2.0.0
    and forms 6i and reports 6i server,when we are running the test form with all the settings required for running forms as servlets tesst forms is coming successfully.But when with the same parameter we are running our form which makes databse connection gives the above ORA error 12222.
    to ensure that it is not a protocol adapter problem we remove one line
    ;serverURL= ---- this line is commented-----
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    Since this one line change made Listener Servlet inactive and forms listerner as active component.
    looking at the above situation we came to conclusion that it should not be a TNS protocol adaptor probel. so there must be either some problem with the configuration or some probelem with the patch 6 itself.
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    null

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  • TNS-12541: TNS:no listener   TNS-12560: TNS:protocol adapter error    TNS-00511: No listener

    Dear Team,
                            When I am trying to start my LISTENER  on my Windows server manually its showing error like The OracleOraDb11g_home1TNSListener service on Local Computer started and then stopped. Some services stop automatically if they are not in use by other services or programs.I Have created LISTENER twice also.When I am checking status on CMD prompt below is error is showing.Please help me out how to solve the issue.
    LSNRCTL> status
    Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=<host name>)(PORT=1521)))
    TNS-12541: TNS:no listener
    TNS-12560: TNS:protocol adapter error
      TNS-00511: No listener
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    Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC0)))
    TNS-12541: TNS:no listener
    TNS-12560: TNS:protocol adapter error
      TNS-00511: No listener
      32-bit Windows Error: 2: No such file or directory
    Regards,
    Praveen K

    Hi,
    Did you check whether the windows service for listener is up and running? if not please start it, by typing "services.msc" in run window and start the service. Then check whether you have listener.ora file in $ORACLE_HOME/network/admin and also post listener.ora contents.
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  • TNS: no such protocol error

    Hi,
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    Please find below the output.
    $ lsnrctl services
    LSNRCTL for Linux: Version 11.2.0.2.0 - Production on 03-APR-2012 06:08:23
    Copyright (c) 1991, 2010, Oracle. All rights reserved.
    Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=VM.xxx.com )(PORT=1525)))
    The listener supports no services
    The command completed successfully
    $ lsnrctl status
    LSNRCTL for Linux: Version 11.2.0.2.0 - Production on 03-APR-2012 06:13:18
    Copyright (c) 1991, 2010, Oracle. All rights reserved.
    Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=VM.xxx.com )(PORT=1525)))
    STATUS of the LISTENER
    Alias LISTENER
    Version TNSLSNR for Linux: Version 11.2.0.2.0 - Production
    Start Date 02-APR-2012 02:51:12
    Uptime 1 days 3 hr. 22 min. 5 sec
    Trace Level off
    Security ON: Local OS Authentication
    SNMP OFF
    Listener Parameter File /oracle11g/o11gr22/app/o11gr22/product/11.1.0/db_1/network/admin/listener.ora
    Listener Log File /oracle11g/o11gr22/diag/tnslsnr/VM/listener/alert/log.xml
    Listening Endpoints Summary...
    (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=VM.xxx.com )(PORT=1525)))
    (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1525)))
    The listener supports no services
    The command completed successfully
    $ cat /etc/hosts
    127.0.0.1 localhost.localdomain localhost
    10.123.256.177 VM.xxx.com VM VM.in.oracle.com
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  • ORA-12222 : TNS:No such protocol adapter -error

    Hi
    when i try to connect database from forms builder i get the below error.
    ORA-12222 : TNS : No such protocol adapter. I refered many forums and help sites... i checked everyting in my system. like Regedit and environment variable.
    still i am getting the same error. kindly help to resolve this issue.
    Please find the below details of my desktop, form builder and Oracle database.
    Desktop OS
    Operating system : WINDOWS XP (professional) version 2002 service pack 3
    Oracle Database
    Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
    PL/SQL Release 10.2.0.4.0 - Production
    CORE     10.2.0.4.0     Production
    TNS for Linux: Version 10.2.0.4.0 - Production
    NLSRTL Version 10.2.0.4.0 - Production
    Oracle database installed in Linux server
    linux server details
    Linux VM177 2.6.18-194.0.0.0.3.el5xen #1 SMP Mon Mar 29 18:27:00 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
    any rpm are required in Linux server resolve this issue.
    my linux server i couldn't find any rpms OPENM*
    $ rpm -qa openm*
    $
    Oracle forms builder
    Forms [32 Bit] Version 6.0.8.24.1 (Production)
    Oracle Toolkit Version 6.0.8.24.0 (Production)
    PL/SQL Version 8.0.6.3.0 (Production)
    Oracle Procedure Builder V6.0.8.21.0 Build #1459 - Production
    PL/SQL Editor (c) WinMain Software (www.winmain.com), v1.0 (Production)
    Oracle Query Builder 6.0.7.1.0 - Production
    Oracle Virtual Graphics System Version 6.0.5.38.0 (Production)
    Oracle Tools GUI Utilities Version 6.0.8.20.1 (Production)
    Oracle Multimedia Version 6.0.8.20.0 (Production)
    Oracle Tools Integration Version 6.0.8.18.0 (Production)
    Oracle Tools Common Area Version 6.0.8.18.0
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    Thanks in advance. your early reply will be very much appriciated.
    Gowtham

    Please find below the output.
    $ lsnrctl services
    LSNRCTL for Linux: Version 11.2.0.2.0 - Production on 03-APR-2012 06:08:23
    Copyright (c) 1991, 2010, Oracle. All rights reserved.
    Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=VM.xxx.com )(PORT=1525)))
    The listener supports no services
    The command completed successfully
    $ lsnrctl status
    LSNRCTL for Linux: Version 11.2.0.2.0 - Production on 03-APR-2012 06:13:18
    Copyright (c) 1991, 2010, Oracle. All rights reserved.
    Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=VM.xxx.com )(PORT=1525)))
    STATUS of the LISTENER
    Alias LISTENER
    Version TNSLSNR for Linux: Version 11.2.0.2.0 - Production
    Start Date 02-APR-2012 02:51:12
    Uptime 1 days 3 hr. 22 min. 5 sec
    Trace Level off
    Security ON: Local OS Authentication
    SNMP OFF
    Listener Parameter File /oracle11g/o11gr22/app/o11gr22/product/11.1.0/db_1/network/admin/listener.ora
    Listener Log File /oracle11g/o11gr22/diag/tnslsnr/VM/listener/alert/log.xml
    Listening Endpoints Summary...
    (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=VM.xxx.com )(PORT=1525)))
    (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1525)))
    The listener supports no services
    The command completed successfully
    $ cat /etc/hosts
    127.0.0.1 localhost.localdomain localhost
    10.123.256.177 VM.xxx.com VM VM.in.oracle.com
    Gowtham

  • TNS:no such protocol adapter

    Hai,
    When i tried to start lsnrctl>start
    i got the following error messages please if some one could resolve my problem it is very urgent
    LSNRCTL> start
    Starting /usr2/oracle/u01/app/oracle/product/8.1.6/bin/tnslsnr: please wait...
    TNSLSNR for Linux: Version 8.1.6.0.0 - Production
    System parameter file is /usr2/oracle/u01/app/oracle/product/8.1.6/network/admin/listener.ora
    Log messages written to /usr2/oracle/u01/app/oracle/product/8.1.6/network/log/listener.log
    Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC)))
    Attempted to listen on: (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=dbserver)(PORT=1521)))
    TNS-12538: TNS:no such protocol adapter
    TNS-12560: TNS:protocol adapter error
    TNS-00508: No such protocol adapter
    null

    <BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Anand Sengodan ([email protected]):
    Hai,
    When i tried to start lsnrctl>start
    i got the following error messages please if some one could resolve my problem it is very urgent
    LSNRCTL> start
    Starting /usr2/oracle/u01/app/oracle/product/8.1.6/bin/tnslsnr: please wait...
    TNSLSNR for Linux: Version 8.1.6.0.0 - Production
    System parameter file is /usr2/oracle/u01/app/oracle/product/8.1.6/network/admin/listener.ora
    Log messages written to /usr2/oracle/u01/app/oracle/product/8.1.6/network/log/listener.log
    Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC)))
    Attempted to listen on: (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=dbserver)(PORT=1521)))
    TNS-12538: TNS:no such protocol adapter
    TNS-12560: TNS:protocol adapter error
    TNS-00508: No such protocol adapter
    <HR></BLOCKQUOTE>
    Would probably have to see your listener.ora to know for sure but two things I would look for: AFAIK you can use either tcp or udp for the PROTOCOL= statement in the listener.ora, the Oracle Listener listens on port 1521 so you should add port 1521 to your SERVICES file in the /etc directory. See if either of those help any..
    dmm
    null

  • TNS-12538: TNS:no such protocol adapter

    hi, i'm a newbie for oracle... now I face some problem while i try to create database.
    After i installed Oracle 10g on Solaris 10x86-64, I created listener.ora by using netca.
    but I cannot start it. error shown as
    $ lsnrctl start
    TNSLSNR for Solaris: Version 10.2.0.3.0 - Production
    System parameter file is /oracle/ZTDB3/bin/oracle10/product/10.2.0/network/admin/listener.ora
    Log messages written to /oracle/ZTDB3/bin/oracle10/product/10.2.0/network/log/listener.log
    TNS-01150: The address of the specified listener name is incorrect
    TNS-01153: Failed to process string: (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.104.131.92)(PORT=1524)))
    Listener failed to start. See the error message(s) above...
    $ lsnrctl status
    LSNRCTL for Solaris: Version 10.2.0.3.0 - Production on 12-SEP-2008 10:05:30
    Copyright (c) 1991, 2006, Oracle. All rights reserved.
    Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.104.131.92)(PORT=1524)))
    TNS-12538: TNS:no such protocol adapter
    TNS-12560: TNS:protocol adapter error
    TNS-00508: No such protocol adapter
    how can I fix this problem? also I cannot sqlplus / as sysdba
    error shown as
    $ sqlplus / as sysdba
    SQL*Plus: Release 10.2.0.3.0 - Production on Fri Sep 12 10:28:56 2008
    Copyright (c) 1982, 2006, Oracle. All Rights Reserved.
    ERROR:
    ORA-12157: TNS:internal network communication error
    please help me...thank you.

    Hi Rajesh Vig
    Thank for your help.
    I did change follow your advice. But it doesn't work at all.
    However, before finishing configured listener, something warn me as popup message.
    "The information provided for this listener is currently in use by other software on this computer.
    You can proceed with the configuration as it is, but it will not be possible to start this listener until
    the conflict is resolved."
    I'm so doubt, what wrong with my listener. Why did oracle warn me that my listener was conflict with another. Although, there was no listener.ora at that time. ?????
    Here is my new listener.ora created by netca.
    SID_LIST_LISTENER =
    (SID_LIST =
    (SID_DESC =
    (SID_NAME = PLSExtProc)
    (ORACLE_HOME = /oracle/ZTDB3/bin/oracle10/product/10.2.0)
    (PROGRAM = extproc)
    LISTENER =
    (DESCRIPTION_LIST =
    (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 10.104.131.92)(PORT = 1530))
    (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
    $ lsnrctl start
    TNSLSNR for Solaris: Version 10.2.0.3.0 - Production
    System parameter file is /oracle/ZTDB3/bin/oracle10/product/10.2.0/network/admin/listener.ora
    Log messages written to /oracle/ZTDB3/bin/oracle10/product/10.2.0/network/log/listener.log
    TNS-01150: The address of the specified listener name is incorrect
    TNS-01153: Failed to process string: (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=ztdb3)(PORT=1530)))
    Listener failed to start. See the error message(s) above...
    $ netstat -an | grep 1530
    no result shown up.
    If you have found something wrong, please advise me. Thank you.

  • TNS-12538: TNS:no such protocol adapter, please delete this thread, Sorry!

    Hello,
    I am trying to install oracleAS Infrastructure and portal on my windows xp pc,
    At some point of the installation for Internet Directory Configuration Assistant, there is an error:
    ===========================================================
    Output generated from configuration assistant "Internet Directory Configuration Assistant" (attempt 2):
    Myinfra.mypcname.domainname
    java.sql.SQLException: Io exception: The Network Adapter could not establish the connectionat oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:137)
    ===========================================================
    After did some searching, I find I may need to install MS loopback adapter.
    So I followed http://support.microsoft.com/kb/839013 to install the MS Loopback adapter.
    After I installed, When I open the Network Connetcions, I found there are two local area connetcions. One of then called local area connection 2, and it's MS loopback adapter. I got a warning for local area connection 2, it says that my pc does not have a IP address assigned, and its status is : limited or no connectivity .
    I tried to repair to establish the full connection by clicking on the repair button, but the process is failed.
    I also tried to run command: tnsping orcl ( orcl is my database service name )
    tnsping orcl, still got this error:
    ======================================================
    C:\>tnsping orcl
    TNS Ping Utility for 32-bit Windows: Version 9.0.1.4.1 - Production on 16-MAR-20
    06 22:41:35
    Copyright (c) 1997 Oracle Corporation. All rights reserved.
    Used parameter files:
    E:\oracle\product\10.1.0\Db_1\network\admin\sqlnet.ora
    Used TNSNAMES adapter to resolve the alias
    Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST =mypcname.mydomainname)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = o
    rcl)))
    TNS-12538: TNS:no such protocol adapter
    ===================================================
    btw. my pc IP was assigned by DHCP, and pc host name is something like: abcd.abc.edu
    Q1. I am wondering which local area connection is currently used by default ? If it's the old one, how to configure it to use the new added one? ( local area connetcion 2 )
    Q2. Do I have to install MS Loopback adapter ? I don't have a fixed IP, however my IP is seldom changed. And I'm ok with 127.0.0.1
    Any suggestion ?
    Thanks for your reply,
    Emily

    Hi Rajesh Vig
    Thank for your help.
    I did change follow your advice. But it doesn't work at all.
    However, before finishing configured listener, something warn me as popup message.
    "The information provided for this listener is currently in use by other software on this computer.
    You can proceed with the configuration as it is, but it will not be possible to start this listener until
    the conflict is resolved."
    I'm so doubt, what wrong with my listener. Why did oracle warn me that my listener was conflict with another. Although, there was no listener.ora at that time. ?????
    Here is my new listener.ora created by netca.
    SID_LIST_LISTENER =
    (SID_LIST =
    (SID_DESC =
    (SID_NAME = PLSExtProc)
    (ORACLE_HOME = /oracle/ZTDB3/bin/oracle10/product/10.2.0)
    (PROGRAM = extproc)
    LISTENER =
    (DESCRIPTION_LIST =
    (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 10.104.131.92)(PORT = 1530))
    (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
    $ lsnrctl start
    TNSLSNR for Solaris: Version 10.2.0.3.0 - Production
    System parameter file is /oracle/ZTDB3/bin/oracle10/product/10.2.0/network/admin/listener.ora
    Log messages written to /oracle/ZTDB3/bin/oracle10/product/10.2.0/network/log/listener.log
    TNS-01150: The address of the specified listener name is incorrect
    TNS-01153: Failed to process string: (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=ztdb3)(PORT=1530)))
    Listener failed to start. See the error message(s) above...
    $ netstat -an | grep 1530
    no result shown up.
    If you have found something wrong, please advise me. Thank you.

  • "ORA-12222 TNS no such protocol adapter" When running Forms after installing Portal

    We have a Forms 6i (web) application running on 9iAS. This worked fine. But after installing Portal on the same 9iAS, we got the following error when starting the WebForms application:
    ORA-12222 TNS no such protocol adapter
    Who knows a solution?
    Configuration
    9IAS v1.0.2.2
    8.1.7
    Form 6i Patch 10
    Windows NT
    Best regards,
    Harm van Zoest

    This is s SQLNET error.
    You can search for it on OTN using the search button.
    IT usually means that the tnsnames.ora file was changed. Or that you are now using another tnsnames.ora.

  • TNS-12538: TNS:no such protocol adapter, and install MS loopback adapter

    Hello,
    I am trying to install oracleAS Infrastructure and portal on my windows xp pc. (Oracle Application Server 10g Release 2 (10.1.2)
    At some point of the installation for Internet Directory Configuration Assistant, there is an error:
    ===========================================================
    Output generated from configuration assistant "Internet Directory Configuration Assistant" (attempt 2):
    Myinfra.mypcname.domainname
    java.sql.SQLException: Io exception: The Network Adapter could not establish the connectionat oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:137)
    ===========================================================
    After did some searching, I find I may need to install MS loopback adapter.
    So I followed http://support.microsoft.com/kb/839013 to install the MS Loopback adapter.
    After I installed, When I open the Network Connetcions, I found there are two local area connetcions. One of then called local area connection 2, and it's MS loopback adapter. I got a warning for local area connection 2, it says that my pc does not have a IP address assigned, and its status is : limited or no connectivity .
    I tried to repair to establish the full connection by clicking on the repair button, but the process is failed.
    I also tried to run command: tnsping orcl ( orcl is my database service name ), after installed the loopback adapter.
    tnsping orcl, still got this error:
    ======================================================
    C:\>tnsping orcl
    TNS Ping Utility for 32-bit Windows: Version 9.0.1.4.1 - Production on 16-MAR-20
    06 22:41:35
    Copyright (c) 1997 Oracle Corporation. All rights reserved.
    Used parameter files:
    E:\oracle\product\10.1.0\Db_1\network\admin\sqlnet.ora
    Used TNSNAMES adapter to resolve the alias
    Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST =mypcname.mydomainname)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl)))
    TNS-12538: TNS:no such protocol adapter
    ===================================================
    btw. my pc IP was assigned by DHCP, and pc host name is something like: abcd.abc.edu
    Q1. I am wondering which local area connection is currently used by default ? If it's the old one, how to configure it to use the new added one? ( local area connetcion 2 ).
    Q2. Do I have to install MS Loopback adapter for installing Oracle Application Server 10g Release 2 (10.1.2)?
    I don't have a fixed IP, however my IP is seldom changed. And I'm ok with 127.0.0.1
    Any suggestion ?
    Thanks for your reply,
    Emily

    Hello,
    I am trying to install oracleAS Infrastructure and portal on my windows xp pc. (Oracle Application Server 10g Release 2 (10.1.2)
    At some point of the installation for Internet Directory Configuration Assistant, there is an error:
    ===========================================================
    Output generated from configuration assistant "Internet Directory Configuration Assistant" (attempt 2):
    Myinfra.mypcname.domainname
    java.sql.SQLException: Io exception: The Network Adapter could not establish the connectionat oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:137)
    ===========================================================
    After did some searching, I find I may need to install MS loopback adapter.
    So I followed http://support.microsoft.com/kb/839013 to install the MS Loopback adapter.
    After I installed, When I open the Network Connetcions, I found there are two local area connetcions. One of then called local area connection 2, and it's MS loopback adapter. I got a warning for local area connection 2, it says that my pc does not have a IP address assigned, and its status is : limited or no connectivity .
    I tried to repair to establish the full connection by clicking on the repair button, but the process is failed.
    I also tried to run command: tnsping orcl ( orcl is my database service name ), after installed the loopback adapter.
    tnsping orcl, still got this error:
    ======================================================
    C:\>tnsping orcl
    TNS Ping Utility for 32-bit Windows: Version 9.0.1.4.1 - Production on 16-MAR-20
    06 22:41:35
    Copyright (c) 1997 Oracle Corporation. All rights reserved.
    Used parameter files:
    E:\oracle\product\10.1.0\Db_1\network\admin\sqlnet.ora
    Used TNSNAMES adapter to resolve the alias
    Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST =mypcname.mydomainname)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl)))
    TNS-12538: TNS:no such protocol adapter
    ===================================================
    btw. my pc IP was assigned by DHCP, and pc host name is something like: abcd.abc.edu
    Q1. I am wondering which local area connection is currently used by default ? If it's the old one, how to configure it to use the new added one? ( local area connetcion 2 ).
    Q2. Do I have to install MS Loopback adapter for installing Oracle Application Server 10g Release 2 (10.1.2)?
    I don't have a fixed IP, however my IP is seldom changed. And I'm ok with 127.0.0.1
    Any suggestion ?
    Thanks for your reply,
    Emily

  • Designer6i - can't connect database TNS:no such protocol adapter

    Cannot connect to database with Repository Administration Utility.
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    Hi PAUL,
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    Kavita
    <BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Paul Kwok ([email protected]):
    Cannot connect to database with Repository Administration Utility.
    I have installed Oracle8i Enterprise Edition Release 2 on my WindowsNT in one oracle_home (ora8i) and Designer 6i in the same machine in another oracle_home (orades which is DEFAULT_HOME).
    Installation is successful. I have set up the tnsnames.ora file in the directory d:\orades\net80\admin. I have also set the registry variables \HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\TNS_ADMIN
    and
    \HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\Home1\TNS_ADMIN
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    From ora8i->DatabaseAdministration->DBA Studio I can connect to the database using the service string in the above tnsnames.ora file.
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    The TCP network protocol is installed for Designer6i as the folder "tnsapi" exists in orades\net80.
    Can anyone please point out what is wrong and help? thanks
    <HR></BLOCKQUOTE>
    null

  • Database link : TNS-12538: TNS:no such protocol adapter

    I have created a database link on schema1:
    CREATE public DATABASE LINK db_link
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