about make_plots_and_stats --input links.blp --out stats/ and Exception ValueError: 'zero-size array to reduction operation minimum which has no identity' in 'primo.linking.plots_and_stats.PlotHistogram' ignored

[shipanda]

The command line is like follow and there is an Exception ValueError: 'zero-size array to reduction operation minimum which has no identity' in 'primo.linking.plots_and_stats.PlotHistogram' ignored.
How to deal with it?

xxx$ make_plots_and_stats --input links.blp --out stats/
2017-07-11 12:03:27,441 [root] [INFO ] Loading file links.blp.
2017-07-11 12:03:27,444 [root] [INFO ] Loaded 21 Intent links.
2017-07-11 12:03:27,445 [root] [INFO ] Plotting probability distribution CDF.
/usr/lib/pymodules/python2.7/matplotlib/font_manager.py:1236: UserWarning: findfont: Font family ['Times New Roman'] not found. Falling back to Bitstream Vera Sans
(prop.get_family(), self.defaultFamily[fontext]))
/usr/lib/pymodules/python2.7/matplotlib/font_manager.py:1246: UserWarning: findfont: Could not match :family=Bitstream Vera Sans:style=normal:variant=normal:weight=normal:stretch=normal:size=22.0. Returning /usr/share/matplotlib/mpl-data/fonts/ttf/cmb10.ttf
UserWarning)
2017-07-11 12:03:28,078 [root] [INFO ] Finished plotting probability distribution CDF.
2017-07-11 12:03:28,079 [root] [INFO ] Plotting probability distribution histogram.
2017-07-11 12:03:28,383 [root] [INFO ] Finished plotting probability distribution histogram.
2017-07-11 12:03:28,384 [root] [INFO ] Plotting probability distribution by inter/intra app Intent.
/usr/lib/pymodules/python2.7/matplotlib/font_manager.py:1246: UserWarning: findfont: Could not match :family=Bitstream Vera Sans:style=normal:variant=normal:weight=normal:stretch=normal:size=32.0. Returning /usr/share/matplotlib/mpl-data/fonts/ttf/cmb10.ttf
UserWarning)
/usr/lib/pymodules/python2.7/matplotlib/axes.py:8261: UserWarning: 2D hist input should be nsamples x nvariables;
this looks transposed (shape is 0 x 1)
'this looks transposed (shape is %d x %d)' % x.shape[::-1])
Exception ValueError: 'zero-size array to reduction operation minimum which has no identity' in 'primo.linking.plots_and_stats.PlotHistogram' ignored
Exception ValueError: 'zero-size array to reduction operation minimum which has no identity' in 'primo.linking.plots_and_stats.PlotHistogram' ignored
Exception ValueError: 'zero-size array to reduction operation minimum which has no identity' in 'primo.linking.plots_and_stats.PlotHistogram' ignored
2017-07-11 12:03:28,785 [root] [INFO ] Finished plotting histograms.
2017-07-11 12:03:28,785 [root] [INFO ] Computing Intent connectivities.
2017-07-11 12:03:28,800 [root] [INFO ] Finished computing Intent connectivities from Intent links.
2017-07-11 12:03:28,800 [root] [INFO ] Computing connectivity CDFs.
/usr/lib/pymodules/python2.7/matplotlib/axes.py:8332: RuntimeWarning: divide by zero encountered in true_divide
m = (m.astype(float) / db) / m.sum()
/usr/lib/pymodules/python2.7/matplotlib/axes.py:8332: RuntimeWarning: invalid value encountered in true_divide
m = (m.astype(float) / db) / m.sum()
/usr/lib/pymodules/python2.7/matplotlib/axes.py:8348: RuntimeWarning: invalid value encountered in multiply
n = [(m * np.diff(bins))[slc].cumsum()[slc] for m in n]
/usr/lib/pymodules/python2.7/matplotlib/axes.py:2536: UserWarning: Attempting to set identical left==right results
in singular transformations; automatically expanding.
left=1.0, right=1.0

• 'left=%s, right=%s') % (left, right))
  2017-07-11 12:03:29,001 [root] [INFO ] Plotting link CDF.
  2017-07-11 12:03:29,200 [root] [INFO ] Finished plotting link CDF.