*/
public static Frame parseFrame(Key okey, File file) throws IOException {
if( !file.exists() )
throw new FileNotFoundException("File not found " + file);
if(okey == null) okey = Key.make(file.getName());
NFSFileVec nfs = NFSFileVec.make(file);
return water.parser.ParseDataset2.parse(okey, nfs._key);
}