code: function parse_PtgAreaErr(blob, length, opts) {
  	var type = (blob[blob.l++] & 0x60) >> 5;
  	blob.l += opts && (opts.biff > 8) ? 12 : (opts.biff < 8 ? 6 : 8);
  	return [type];
  }
docs: /* [MS-XLS] 2.5.198.29 ; [MS-XLSB] 2.5.97.20