Hi Gurus, I get the below error when i did database refresh from my production Hot backup. Dev team asked me to exclude some of the tablespace while doing refresh, So i have created control files with the list of datafiles and recovered until time. .When i planned to drop the tablespace of those datafile which were waiting for recovery, i get the below error SQL> drop tablespace C_LCFJ_BDACCT_MV including contents and datafiles; drop tablespace C_LCFJ_BDACCT_MV including contents and datafiles * ERROR at line 1: ORA-23515: materialized views and/or their indices exist in the tablespace kindly help me to over come this issue. i have tried to find the MViews in C_LCFJ_BDACCT_MV tbs and dropped them, still get the same error. Regards, Nagaraj