Hi All, If we try to perform any operation on a particular table, we are keep getting "ORA-01460: unimplemented or unreasonable conversion requested" What could be wrong here? If it is related to data block corruption how to identify the block which got corrupted. Thanks in advance -- Sami Seerangan Oracle DBA -- To unsubscribe - mailto:oracle-l-request@xxxxxxxxxxxxx&subject=unsubscribe To search the archives - //www.freelists.org/archives/oracle-l/