Error ORA-01178

ORA-01178: file string created before last CREATE CONTROLFILE, cannot recreate

Cause: Attempted to use ALTER DATABASE CREATE DATAFILE to recreate a datafile that existed at the last CREATE CONTROLFILE command. The information needed to recreate the file was lost with the control file that existed when the file was added to the database.

Action: Find a backup of the file, and recover it. Do incomplete recovery to time before file was originally created.