if file != "" {
		distrib := make([][]string, setCount)
		b, err := os.ReadFile(file)
		if err != nil {
			log.Fatalln(err)
		}
		b = bytes.ReplaceAll(b, []byte("\r"), []byte{})
		sc := bufio.NewScanner(bytes.NewBuffer(b))
		for sc.Scan() {
			object = strings.TrimSpace(sc.Text())
			set := sipHashMod(prefix+object, setCount, id)
			distrib[set] = append(distrib[set], prefix+object)
		}
		for set, files := range distrib {

			if err != nil {
				return nil, err
			}
			b, _, minor, err := checkXL2V1(b)
			if err != nil {
				return nil, err
			}
			filemap[file] = make(map[string]string)
			buf := bytes.NewBuffer(nil)
			v0 := ""
			var data xlMetaInlineData
			switch minor {
			case 0:
				_, err = msgp.CopyToJSON(buf, bytes.NewReader(b))
				if err != nil {
					return nil, err
				}
			case 1, 2:

					r, err := file.Open()
					if err != nil {
						return err
					}

					b, err := io.ReadAll(r)
					if err != nil {
						return err
					}
					buf := bytes.NewBuffer(nil)
					if _, err = msgp.CopyToJSON(buf, bytes.NewReader(b)); err != nil {
						return err
					}

					dec := json.NewDecoder(buf)
					// Use number to preserve integers.
					dec.UseNumber()