Tom, The problem is that you moved the file.
Oracle will use the same file name, when you stop/restart tracing, and in fact leaves the file handle open until the session disconnects. Moving the file disables the output. Jared "Xie, Tom" <[EMAIL PROTECTED]> Sent by: [EMAIL PROTECTED] 10/08/2002 11:03 AM Please respond to ORACLE-L To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]> cc: Subject: How to re-trace a session Hello, I successfully traced a long running session by using dbms_system.set_ev procedure, and moved the trace file to somewhere else. However, when I used the same command to re-trace the same session, I can't see the trace file again. There was no error message. I tried to use oradebug and dbms_system.set_sql_trace_in_session to trace the same session. No matter what method I used, I still can't see the trace file. Then, I tried to trace other sessions using all available methods, but all failed. Even though there was no error message, I can't see trace files. Can someone tell me what is wrong and how can I re-enable the sql trace? Tom -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Xie, Tom INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).