Oracle® Database 11g / 12c / 18c error codes ORA-01259: unable to delete datafile [string]
ORA-01259: unable to delete datafile [string]
Oracle Error Code: ORA-01259
Cause: A DROP TABLESPACE INCLUDING CONTENTS AND DATAFILES operation was not able to delete a datafile in the tablespace.
Action: Subsequent errors describe the operating system error that prevented the file deletion. Fix the problem, if possible, and manually purge the file.