When I set the connecting information on the GUI in SQLDeveloper I get the following error (everytime!)
Status : Failure -Test failed: IO Error: The Network Adapter could not establish the connection
Conn. type: basic / Role: default
I couldn't connect with the sys user either.
Previously I successfully unlocked the HR user through SQLPLUS command line
(as described here:
and set the port=localhost in the tnsnames.ora and listener.ora, the OracleXETNSListener service is up and running as well as the OracleServiceXE)
Sadly I'm still getting this error message...
I'm on a laptop (with wireless wifi connection only), under Windows 7. What might be the problem? Thank you for your help.