features.py Cause ERROR "check_array ValueError: Found array with 0 sample(s)"

[hana9090]

I have successfully run the following:

• database (oxford)
• database (paris)
• data/models/fetch_models.sh
• read_data.py

But when I run features.py I have the following error:

Traceback (most recent call last): File "features.py", line 119, in <module> learn_transform(params,feats) File "features.py", line 23, in learn_transform feats = normalize(feats) File "/usr/lib/python2.7/dist-packages/sklearn/preprocessing/data.py", line 1280, in normalize estimator='the normalize function', dtype=FLOAT_DTYPES) File "/usr/lib/python2.7/dist-packages/sklearn/utils/validation.py", line 407, in check_array context)) ValueError: Found array with 0 sample(s) (shape=(0, 512)) while a minimum of 1 is required by the normalize function.