viewport error for polar map projection

[lee1043]

I was following the tutorial but setting polar map projection returns viewpoint error. It happened on Crunchy, but when I was running this on my Mac it was fine.

import cdms2, vcs
f=cdms2.open('clt.nc')
s=f('clt')
x=vcs.init()
box = vcs.createboxfill()
box.projection = 'polar'
x.plot(s, box)
x.png('test.png')

Error:

Traceback (most recent call last):
  File "test_plot.py", line 8, in <module>
    x.plot(s, box)
  File "/export_backup/lee1043/anaconda2/envs/uvcdat-2.12/lib/python2.7/site-packages/vcs/Canvas.py", line 2690, in plot
    a = self.__plot(arglist, keyargs)
  File "/export_backup/lee1043/anaconda2/envs/uvcdat-2.12/lib/python2.7/site-packages/vcs/Canvas.py", line 4020, in __plot
    returned_kargs = self.backend.plot(*arglist, **keyargs)
  File "/export_backup/lee1043/anaconda2/envs/uvcdat-2.12/lib/python2.7/site-packages/vcs/VTKPlots.py", line 680, in plot
    vtk_backend_grid, vtk_backend_geo, **kargs))
  File "/export_backup/lee1043/anaconda2/envs/uvcdat-2.12/lib/python2.7/site-packages/vcs/vcsvtk/pipeline2d.py", line 326, in plot
    self._plotInternal()
  File "/export_backup/lee1043/anaconda2/envs/uvcdat-2.12/lib/python2.7/site-packages/vcs/vcsvtk/boxfillpipeline.py", line 159, in _plotInternal
    self._gm, t, z, **kwargs))
  File "/export_backup/lee1043/anaconda2/envs/uvcdat-2.12/lib/python2.7/site-packages/vcs/VTKPlots.py", line 866, in renderTemplate
    displays = tmpl.plot(self.canvas, data, gm, bg=self.bg, X=X, Y=Y, **kargs)
  File "/export_backup/lee1043/anaconda2/envs/uvcdat-2.12/lib/python2.7/site-packages/vcs/template.py", line 1759, in plot
    **kargs)
  File "/export_backup/lee1043/anaconda2/envs/uvcdat-2.12/lib/python2.7/site-packages/vcs/template.py", line 1115, in drawTicks
    tt.viewport = vp
  File "/export_backup/lee1043/anaconda2/envs/uvcdat-2.12/lib/python2.7/site-packages/vcs/__init__.py", line 56, in __setattr__
    super(bestMatch, self).__setattr__(a, v)
  File "/export_backup/lee1043/anaconda2/envs/uvcdat-2.12/lib/python2.7/site-packages/vcs/textcombined.py", line 323, in _setviewport
    self.Tt.viewport = value
  File "/export_backup/lee1043/anaconda2/envs/uvcdat-2.12/lib/python2.7/site-packages/vcs/__init__.py", line 56, in __setattr__
    super(bestMatch, self).__setattr__(a, v)
  File "/export_backup/lee1043/anaconda2/envs/uvcdat-2.12/lib/python2.7/site-packages/vcs/texttable.py", line 354, in _setvp
    maxvalue=1.)
  File "/export_backup/lee1043/anaconda2/envs/uvcdat-2.12/lib/python2.7/site-packages/vcs/VCS_validation_functions.py", line 242, in checkListOfNumbers
    checkNumber(self, name, v, minvalue=minvalue, maxvalue=maxvalue)
  File "/export_backup/lee1043/anaconda2/envs/uvcdat-2.12/lib/python2.7/site-packages/vcs/VCS_validation_functions.py", line 181, in checkNumber
    checkedRaise(self, value, ValueError, name + ' must be a number')
  File "/export_backup/lee1043/anaconda2/envs/uvcdat-2.12/lib/python2.7/site-packages/vcs/VCS_validation_functions.py", line 59, in checkedRaise
    raise ex(err)
ValueError: viewport must be a number

VCS version

(uvcdat-2.12) -bash-4.1$ conda list vcs
# packages in environment at /export_backup/lee1043/anaconda2/envs/uvcdat-2.12:
#
vcs                       2.12             py27had75802_0    uvcdat
vcsaddons                 2.12             py27h7706516_0    uvcdat

[lee1043]

Created a new conda env with pmp and latest vcs, then problem solved. Thanks to @doutriaux1

conda create -n pmp_nightly -c uvcdat/label/nightly -c conda-forge -c 
uvcdat -c pcmdi/label/nightly -c pcmdi pcmdi_metrics