title: ORA-12154: TNS:could not resolve the connect identifier specified
body: <p>The issue started when i installed the server version with already existing client version of Oracle 10g.</p>
  
  <p>Background : The Oracle client version 10g was installed (at c:/oracle) to connect to a database residing in other country. So we can just connect to it and have limited access to it.</p>
  
  <p>Path => c:/oracle/ora_client/network/admin/listener.ora</p>
  
  <p>So to work as admin I installed 10g server at the same location c:/oracle on windows. I can now work as server.</p>
  
  <p>Path => c:/oracle/product/db_1/network/admin/listener.ora</p>
  
  <p>But the issue arises when I try to connect with my application installed to setup connection as a client (to server residing in other country), it fails and throws an error ORA-12154.</p>
  
  <p>So, do I have to uninstall my server version (just in case the confusion might have arrived due to the presence of two Oracle databases)?</p>
  
  <p>How can I fix it? What has been the probable cause for it? Please advise!</p>