I am unable to connect using Direct option. Can you please guide ?
ORA-12541: TNS:no listener
TNS_ADMIN environment variable is not defined
ORACLE_HOME environment variable is defined as "C:\Deshdb\Ora19C"
"C:\Deshdb\Ora19C\Network\Admin\sqlnet.ora" was located
NAMES.DIRECTORY_PATH specifies EZCONNECT in the sqlnet.ora file
Steps to Take
Verify that the correct port is specified
Verify that the listener is running and that it is properly configured
Try to ping 192.168.1.79 using the Ping button on the toolbar
Try to TNSPing (DESCRIPTION=(ADDRESS=(PORT=1521)(HOST=192.168.1.79)(PROTOCOL=TCP))(CONNECT_DATA=(SID=ORASAN))) using the TNS Ping button on the toolbar