Oracle Message ORA-00234 - error in identifying or opening snapshot or copy control file

ERRORerror in identifying or opening snapshot or copy control file
CAUSEA snapshot or copy control file of the specified name could not be found or opened during an invocation of cfileUseSnapshot, cfileMakeAndUseSnapshot, or cfileUseCopy.
ACTIONRe-create the snapshot or copy control file using cfileMakeAndUseSnapshot or ALTER DATABASE BACKUP CONTROLFILE, respectively.