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System.Data.OracleClient.OracleException: ORA-12154: TNS:could not resolve service name while running a C# .NET app

Posted on 2006-06-22
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I got this error"System.Data.OracleClient.OracleException: ORA-12154: TNS:could not resolve service name" while trying to run a C# .NET application which is trying to connect to an Oracle database. The same app runs fine on my personal pc but does not on the test/production servers. Oracle client has been installed on the servers and I am able to connect to Oracle via SQL*Plus on those servers. Please help
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Question by:julnewm
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by:topdog770
ID: 16964886
It would appear that there isn't a system dsn or an oracle directory ( a tsnames ) file on the server.

On your laptop by what mechanism are you connecting to the server?
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by:topdog770
ID: 16964898
Ok.. after READING the question, let me revise this a bit..

how are you referring to the oracle database on your laptop and what's the connection string look like for your db?
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by:topdog770
ID: 16964934
Also when on the server, take a look at the sqlnet.log file, is it possibly a permissions issue, ie access to the tsnames.ora file or oracle directories?  
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by:julnewm
ID: 16972248
I just figured it out what happened. The Production/Test servers are 64bit servers, and my app was installed under c:\program files (x86)\ so the app is having problem communicating with Oracle which was evident from connection error in my sqlnet.log file. I proceeded to remove the application from the server and re-install the app but this time directly under c:\ directory, and Aha!! my app is running and functioning as designed.

Thank you all.
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