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I faced with those errors on 12c database. While I try to drop some tablespace it throws errors such as:
SQL> DROP TABLESPACE MY_TABLESPACE INCLUDING CONTENTS AND DATAFILES; DROP TABLESPACE MY_TABLESPACEINCLUDING CONTENTS AND DATAFILES * ERROR at line 1: ORA-01116: error in opening database file 35 ORA-01110: data file 35: '/u01/app/oracle/product/12.1.0/dbhome_2/dbs/MY_TABLESPACE02_A.DBF' ORA-27041: unable to open file SVR4 Error: 2: No such file or directory Additional information: 3
