ValueError: The number of classes has to be greater than one; got 1

[tilltheworldend]

Hello,
When try to run the code,I meet the error like followings:
('Calculating descriptos. Number of images is', 5)
('Training GMM of size', 5)
(5, 514)
(5,)
Traceback (most recent call last):
File "pyFisherVector.py", line 146, in
classifier = train(gmm, fisher_features)
File "pyFisherVector.py", line 116, in train
clf.fit(X, Y)
File "/usr/local/lib/python2.7/dist-packages/sklearn/svm/base.py", line 150, in fit
y = self._validate_targets(y)
File "/usr/local/lib/python2.7/dist-packages/sklearn/svm/base.py", line 506, in _validate_targets
% len(cls))
ValueError: The number of classes has to be greater than one; got 1

I just put 5 images in a folder,I have printed Y is (0,0,0,0,0).Is it the reason why show the error that the number of classes just got 1?If you know how to solve this problem,could you share with me?Thanks!