Sandra Can you please post call stack from the trace file? or send me the trace file? Do you still get this error, if you select sql_redo alone? Also, you might want to find which segment is causing this issue by querying repeatedly with increasing rownum values, like.. select sql_undo from v$logmnr_contents where rownum <11 , 51 ..etc..That will shed some light in to this issue too. ________________________________ From: Sandra Becker [mailto:sbecker6925@xxxxxxxxx] Sent: Tuesday, December 11, 2007 1:45 PM To: Shamsudeen, Riyaj Cc: oracle-l Subject: Re: Logminer failure I'm using a dictionary file that I created from the same database. Here are the messages from the alert log. Errors in file /u01/app/oracle/admin/prdruby/udump/prdruby_ora_6094.trc: ORA-00603: ORACLE server session terminated by fatal error ORA-00600: internal error code, arguments: [2662], [1], [2146717602], [6773], [2522054752], [16], [], [] Sandy