You said you had a core dump. ORA-7445 is a core dump. At the time that you see the 'end-of-file on communication channel', you should look in the alert log. Is there a core dump recorded there? If so, use that info to look up common causes of 7445. Also, use the stack trace lookup to see if your stack trace resembles a known problem. -Mark -- Mark J. Bobak Senior Oracle Architect ProQuest Information & Learning There is nothing so useless as doing efficiently that which shouldn't be done at all. -Peter F. Drucker, 1909-2005 ________________________________ From: Thomas Day [mailto:tomday2@xxxxxxxxx] Sent: Wednesday, October 25, 2006 1:45 PM To: Bobak, Mark Cc: Oracle-L Freelists Subject: Re: bitmapped index with "parallel" OK? Er ... what does that get me? I don't have an ORA-600 or ORA-7445. Or at least not one that I can see.