Hello All, I have a problem regarding moving tables to another tablespace or same tablespace From sysaux tablespace and from another tablespaces , show same error. DB version: 11.2.0.2 O.s : Windows server 2008 R2 Enterprise Edition ALTER TABLE<table name> MOVE TABLESPACE <tablespace name> ; ALTER TABLE<table name> MOVE TABLESPACE ; ORA-25191: cannot reference overflow table of an index-organized table I searched a lot at MOS and googled the error but I am not sure of it is a bug & I may have to upgrade DB. (Doc ID 49763.1) Please advice. Regards,