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Frequent Oracle Errors
•TNS:could not resolve the connect identifier specified
•Backtrace message unwound by exceptions
•invalid identifier
•PL/SQL compilation error
•internal error
•missing expression
•table or view does not exist
•end-of-file on communication channel
•TNS:listener unknown in connect descriptor
•insufficient privileges
•PL/SQL: numeric or value error string
•TNS:protocol adapter error
•ORACLE not available
•target host or object does not exist
•invalid number
•unable to allocate string bytes of shared memory
•resource busy and acquire with NOWAIT specified
•error occurred at recursive SQL level string
•ORACLE initialization or shutdown in progress
•archiver error. Connect internal only, until freed
•snapshot too old
•unable to extend temp segment by string in tablespace
•Credential retrieval failed
•missing or invalid option
•invalid username/password; logon denied
•unable to create INITIAL extent for segment
•out of process memory when trying to allocate string bytes
•shared memory realm does not exist
•cannot insert NULL
•TNS:unable to connect to destination
•remote database not found'>ora-02019
•exception encountered: core dump
•inconsistent datatypes
•no data found
•TNS:operation timed out
•PL/SQL: could not find program
•existing state of packages has been discarded
•maximum number of processes exceeded
•error signaled in parallel query server
•ORACLE instance terminated. Disconnection forced
•TNS:packet writer failure
•see ORA-12699
•missing right parenthesis
•name is already used by an existing object
•cannot identify/lock data file
•invalid file operation
•quoted string not properly terminated
TNS Resolution

TNS Resolution

2006-01-18       - By Simon Anderson
Reply:     1     2     3     4     5     6     7     8     9     10     >>  

As a wild guess, you're on a Windows PC of some description, and you've
got more than one ORACLE_HOME?

Does your TNSPING provide any more info:
Used parameter files:
c:\oracle\ora92\network\admin\sqlnet.ora

or something like that?

If it is a PC, you could try looking in the registry for the setting of
TNS_ADMIN

Hope that helps

Simon Anderson

> -- --Original Message-- --
> From: oracle-l-bounce@(protected)
> [mailto:oracle-l-bounce@(protected)] On Behalf Of Jonathan Knight
> Sent: 18 January 2006 15:51
> To: Oracle Mailing List
> Subject: TNS Resolution
>
> I have a strange (to me anyway) problem with TNS.
>
> Connecting with SQL*Plus, SQL*Navigator, TOAD: I get
> "ORA-12154 (See ORA-12154.ora-code.com): TNS:could not resolve service name"
>
> But, tnsping returns in 100-130 msecs.  ?!?!?!
>
> I'm confused.  Any thoughts?
>
> Thanks,
> Jon Knight

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