Why is FTK no longer able to connect to Oracle after I renamed my computer?

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:

1. Locate the "HOST =" field in %ORACLE_HOME%\NETWORK\ADMIN\listener.ora
2. 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.)
3. Save your changes to the file
4. Reboot the system