python: cannot import matplotlib._cntr

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Issue #260 new
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I have installed CosmoSIS using the bootstrap but it fails during postprocess.

LOADING CHAIN FROM FILE:  demo5.txt
 - 1D plot  cosmological_parameters--omega_m
Failed in one of the postprocessing steps:  <cosmosis.postprocessing.plots.MetropolisHastingsPlots1D object at 0x2ad6aaca9550>
Here is the error stack:
Traceback (most recent call last):
  File "/local/astspfei/cosmosis/cosmosis/postprocessing/postprocess_base.py", line 181, in run
    files += e.run()
  File "/local/astspfei/cosmosis/cosmosis/postprocessing/plots.py", line 460, in run
    filename = self.make_1d_plot(name)
  File "/local/astspfei/cosmosis/cosmosis/postprocessing/plots.py", line 438, in make_1d_plot
    figure,filename = self.figure(name)
  File "/local/astspfei/cosmosis/cosmosis/postprocessing/plots.py", line 102, in figure
    fig = pylab.figure()
  File "/local/astspfei/cosmosis/cosmosis/postprocessing/lazy_pylab.py", line 63, in __getattr__
    import pylab
  File "/local/astspfei/cosmosis/lib/python2.7/site-packages/pylab.py", line 1, in <module>
    from matplotlib.pylab import *
  File "/local/astspfei/cosmosis/lib/python2.7/site-packages/matplotlib/pylab.py", line 257, in <module>
    from matplotlib import cbook, mlab, pyplot as plt
  File "/local/astspfei/cosmosis/lib/python2.7/site-packages/matplotlib/pyplot.py", line 29, in <module>
    import matplotlib.colorbar
  File "/local/astspfei/cosmosis/lib/python2.7/site-packages/matplotlib/colorbar.py", line 36, in <module>
    import matplotlib.contour as contour
  File "/local/astspfei/cosmosis/lib/python2.7/site-packages/matplotlib/contour.py", line 15, in <module>
    import matplotlib._cntr as _cntr
ImportError: /local/astspfei/cosmosis/lib/python2.7/site-packages/matplotlib/_cntr.so: undefined symbol: _intel_fast_memset

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