Hi Beckstrom, If you are using Oracle Version 9 with the automatic undo management option, these type of messages will reflect in you alert.log. Your message showing that the tablespace 406 is successfully open. You can get full information from v$undostat->UNDOTSN Regards, Sunil Bhola Jeffrey Beckstrom <JBECKSTROM@xxxxxxxxx> wrote: What does this mean in the alert log? Successfully onlined Undo Tablespace 406. Jeffrey Beckstrom Database Administrator Greater Cleveland Regional Transit Authority 1240 W. 6th Street Cleveland, Ohio 44113 Regards, Sunil Bhola Oracle_Expert, Moderator __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com