ORA-19563: string header validation failed

admin

ORA-19563: string headervalidation failed for file string
Cause: Whenopening the file to be placed in a copy or backup set, to be
inspected, or used as the target for an incremental restore, its header was not
recognized as a valid file header for a file of the indicated type (datafile,archived
log, or control file) belonging to the current database.
Action: Ensurethat the correct files are being specified for the copy or backup
operation.