Craig You have my total sympathy. I'm hoping you get some magical replies so and if you do I'll be saving those replies myself. You might try turning on tracing on the client. I believe (haven't tried this myself) that if you have a sqlnet.ora file on the client, you can set trace_level_client to turn on tracing. The reason that server side tracing often doesn't help much is that from the perspective of the server the client just never showed up again. Other things to consider are just randomly changing stuff (one thing at a time) like Oracle client version. The other thing you should consider is to start preparing others for the fact that you may never solve this problem, or certainly won't solve it easily. Press the Microsoft developers for whatever they can do. Dennis Williams DBA Lifetouch, Inc. dwilliams@xxxxxxxxxxxxx -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx]On Behalf Of Craig Healey Sent: Tuesday, March 30, 2004 8:41 AM To: oracle-l@xxxxxxxxxxxxx Subject: ORA-03113 end of file on communication channel Any help would be appreciated. Oracle 8.1.7 on Windows 2000 Server. We have a complex process here, written in VB. It takes about 4 hours to run. Last week it crashed with ORA-03113 showing on the user's screen, but no trace or log files. It's crashed twice today, again with no files generated. This is a major process and I'm under pressure to come up with a solution. I've googled, and checked Metalink, but the error is so general that without an error file I don't know where to start, other than blindly applying "solutions" and hoping one works. I tried tracing the session, but I ended up with 5Mb of FETCH/EXEC in a cursor loop within seconds. There is a lot of VB code, cursors and temporary tables used, and it's politically difficult to re-write. Anyone have any idea where I can start looking for the problem? Craig Healey **************************************************************************** ********************* DISCLAIMER The information on this e-mail is confidential and may be legally privileged. It is intended solely for the addressee and others authorised to receive it. If you are not the intended recipient, any disclosure, copying, distribution or action taken in reliance on its contents is prohibited and may be unlawful. Any views or opinions expressed in this message are those of the individual sender. No contract may be construed by this e-mail. NOTIFICATION WITH REGARD TO PRIVACY Every E-mail in and out of the HHS Domain passes through a moderator. Any email Quarantined within that checker will be subject to scrutiny and may be investigated further in the interest of protecting the everyday activities of this company. Any queries regarding this message please notify system.administrator@xxxxxxxxxx Swept by MIMESweeper for the presence of computer viruses (www.mimesweeper.com) **************************************************************************** ****************** ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx put 'unsubscribe' in the subject line. -- Archives are at //www.freelists.org/archives/oracle-l/ FAQ is at //www.freelists.org/help/fom-serve/cache/1.html ----------------------------------------------------------------- ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx put 'unsubscribe' in the subject line. -- Archives are at //www.freelists.org/archives/oracle-l/ FAQ is at //www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------