Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=4242)(PORT=1521)))In addition to Paul's question concerning your database service being up, are you sure +4242+ is your actual host name and it is resolvable? The error message for the second listening endpoint indicates it's not:
TNS-00513: Destination host unreachableThe error message for the first one aims at Paul's suggestion:
TNS-00511: No listenerIt seems there is no database process running that would "attach" to your IPC listening endpoint.
32-bit Windows Error: 2: No such file or directory
please also post the output of
sqlplus / as sysdba SQL> startup