Server Administration :: Error While Exchanging Partition?

I am not able to exchange partition by following below steps:

drop table manu_tst_hashed_tbl_org;
drop table manu_tst_hashed_tbl_bkp;
drop table manu_tst_smpl_tbl;
CREATE TABLE manu_tst_hashed_tbl_org

[code]...

and getting the below erro:

ORA-14097: column type or size mismatch in ALTER TABLE EXCHANGE PARTITION
14097. 00000 - "column type or size mismatch in ALTER TABLE EXCHANGE PARTITION"
*Cause: The corresponding columns in the tables specified in the ALTER TABLE EXCHANGE PARTITION are of different type or size
*Action: Ensure that the two tables have the same number of columns with the same type and size.