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ORA-12514

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Oracle 12 - Win 2012 R2 Receiving ORA-12514 error Application works fine; just cannot connect to DBVisualizer On one instance, no problem connecting via DBV v9. The other, ORA-12514. Service_Name on both = PSPRODDB TNSNAMES.ORA & LISTENER.ORA appear to be the same Only IPs are different. ******************************************************************************** tnsnames.ora Network Configuration File: D:\oracle\product\12.1.0.2\dbhome_1\network\admin\tnsnames.ora # Generated by Oracle configuration tools. PSPRODDB = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 205.xxx.xx.xx)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = PSPRODDB) ) ) ORACLR_CONNECTION_DATA = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521)) ) (CONNECT_DATA = (SID = CLRExtProc) (PRESENTATION = RO) ) ) LISTENER_PSPRODDB = (ADDRESS = (PROTOCOL = TCP)(HOST = 205.xxx.xx.xx)(PORT = 1521)) ******************************************************************************** ******************************************************************************** # listener.ora Network Configuration File: D:\oracle\product\12.1.0.2\dbhome_1\network\admin\listener.ora # Generated by Oracle configuration tools. SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (SID_NAME = CLRExtProc) (ORACLE_HOME = D:\oracle\product\12.1.0.2\dbhome_1) (PROGRAM = extproc) (ENVS = "EXTPROC_DLLS=ONLY:D:\oracle\product\12.1.0.2\dbhome_1\bin\oraclr12.dll") ) ) LISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 205.xxx.xx.xx)(PORT = 1521)) (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521)) ) ) **********************************************************************
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[This reply is migrated from our old forums.]

Re: ORA-12514
Hi Kinny, The way you have set up the connection in DbVisualizer, the tnsnames.ora file is not used at all. Instead, the driver uses the Database Server, Port and Service values you have entered directly. Before digging deeper, please try changing the Connection Type from Service to SID. After all these years I'm still not clear on the difference other than that URL format differs and only one or the other works in some configurations. Best Regards, Hans