Ben, Do you have LOBs in this table? Be aware that LOBs don't use the traditional Rollback/Undo segments, but use DB Blocks within the table to store the entire LOB in case of DML: This little "feature" has caught many of us... -- John Kanagaraj <>< DB Soft Inc http://www.linkedin.com/in/johnkanagaraj http://jkanagaraj.wordpress.com (Sorry - not an Oracle blog!) ** The opinions and facts contained in this message are entirely mine and do not reflect those of my employer or customers ** -- //www.freelists.org/webpage/oracle-l