A simple issue that can seem complex. Always check if there are multiple Oracle Homes as well. Remove old ones.
You may hit TNSTNS-03505 Message 3511 error message while you are trying to use tnsping command.Complete error message is:
Message 3511 not found; No message file for product=network, facility=TNSTNS-03505: Message 3505 not found; No message file for product=network, facility=TNS
You may hit this error while on database machine or machine which only has client installataion.
I have been face this problem on machine which has 11g client. Also the user is not installation user,so We have been created one other user and give that user to development team.
My installation user is oracle, development user is oracle1… Both user group are same(dba)
Even I can use tnsping with oracle user i can get response, but wiht oracle 1 I am hitting below error
With Oracle user:
TNS Ping Utility for IBM/AIX RISC System/6000: Version 220.127.116.11.0 – Production on 14-FEB-2014 11:08:13
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