ORA 600 errors are unhandled errors by the DB engine. To find the root cause you need to get the true error message. Check you alert.log file then repost it. It will be something like ora-00600: [ some_code_here ] [ some_number_here ] ... >From that we can identify the root cause. To find where your alert.log file is located, log into SQL*Plus and do --> show parameter background_dump_dest <--. Or log into the database via any tool and do --> SELECT * FROM v$parameter WHERE name = 'background_dump_dest'; <-- "Carel Smit" <csmit@xxxxxxxxxxxx> 14-Feb-2006 09:10 Please respond to "Carel Smit" <csmit@xxxxxxxxxxxx> To php-db@xxxxxxxxxxxxx cc Subject Oracle error Hi, Can anyone tell me what the possible causes of this error are? PHP Warning: Unknown: _oci_close_session: OCISessionEnd: ORA-00600: internal error code, arguments: [%s], [%s], [%s], [%s], [%s], [%s], [%s], [%s] in Unknown on line 0 -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php