Symptom: TNS-12545: Connect failed because target host or object does not exist
Cause: The listener configuration hostname value does not match the current hostname of the Oracle system.
Resolution: If FTK is no longer able to connect to Oracle after having renamed your Oracle server system you will need to update Oracle TNS listener configuration file by doing the following:
- Locate the "HOST =" field in %ORACLE_HOME%\NETWORK\ADMIN\listener.ora
- Replace the value of the old name with the new computer host name.
(the current computer host name can be easily identified by issuing the SET COMPUTERNAME command from within a command prompt window.)
- Save your changes to the file
- Reboot the system