/// <exception cref="System.IO.FileNotFoundException"></exception>
        private void OpenTempFile()
        {
            string   uuid     = Misc.TDCreateUUID();
            string   filename = string.Format("{0}.blobtmp", uuid);
            FilePath tempDir  = store.TempDir();

            tempFile  = new FilePath(tempDir, filename);
            outStream = new BufferedOutputStream(new FileOutputStream(tempFile));
        }