I am trying to rename datafile. All I am trying to do is to change its name. Note I am not moving it to a different location. These are my steps:
-take ts offline;
-issue 'alter tablespace rename datafile '/old_name/' to '/new_name/'';
after that I am getting this error:
Ora-01525: error in renaming datafiles
Ora-01522: file /old_name/ to be renamed does not exist.


Please help me to figure it out.
Thank you.