I have instance running fine before I restart the PC. the PC in DHCP so when reboot I could not start the database due to the fact that new IP assign and the lisnter have the old IP. I set static Ip to the original and boot. now I am abale to open the DB from command line, however can not restart DB console. when I try to do that I get an error stating the DbConsole_PCBIOSName_SID not found in ORACLE_HOME/OC4j/j2ee the folder did not have that instance nor my lisnter or tnsname file. my instance call test_IP which is up and running.