"datafile %s not found in backup set"
*Cause: The indicated file could not be restored, because it is not in
this backup set. If the file number is zero, then this refers to
the control file.
*Action: This message is issued when the directory from the first backup
piece is read and one or more files named for restoration were not
found. The restore conversation is still active, but no data
has been read and you must supply the first backup piece of
a backup set that contains all of the requested files.