Whenever you see ORA-3113, that's telling you that connectivity to the database was lost, but not much else. You should check the alert.log for more details. -Mark ________________________________________ From: oracle-l-bounce@xxxxxxxxxxxxx [oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of nilesh kumar [nileshkum@xxxxxxxxx] Sent: Sunday, September 14, 2008 12:23 PM To: oracle-l-admins@xxxxxxxxxxxxx; oracle-l@xxxxxxxxxxxxx Subject: ORA-03113: end-of-file on communication channel Hello All, Hope every one is doing good!. I have a problem while upgrading 9i to 10g.After all the initial settings on windows operating system. I started the database in upgrade mode and ran the script u0902000...this script ran for couple of minmutes and after that It gave this error, when I saw the log file....It shows this way. Please assist me...I am doing this for the first time. Synonym created. Grant succeeded. select dbms_java.longname('foo') from dual * ERROR at line 1: ORA-03113: end-of-file on communication channel ERROR: ORA-03114: not connected to ORACLE ERROR: ORA-03114: not connected to ORACLE Thanks Nilesh -- Soni Temples & Softwares are more or less the same, first we build them and then we pray ;) -- //www.freelists.org/webpage/oracle-l