No valid oracle clients found toad5/24/2023 ![]() ![]() But, tnsping to DB machine is not connecting. ![]() For information about the specific return codes, use the Oracle error tool oerr, by entering the following at any command line: As an example, consider the following nserror entry logged in the trace file shown in Example 16-12: In the preceding entry, the main TNS error is 12537, and its secondary error is 12560. Example 16-5 Listener Log Events for a Successful Connection Request. On the client side, the sqlnet.log file as shown in Example 16-3 contains an error stack corresponding to the ORA-12543 error. ![]()
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