isoline pure numpy fails

[doutriaux1]

No description provided.

[doutriaux1]

import vcs,numpy
import os,cdms2,sys
x=vcs.init()
gm = x.createisoline()
f=cdms2.open(os.path.join(sys.prefix,"sample_data","clt.nc"))
s=f("clt")
x.plot(s.filled(),gm)
x.png("isolines")
raw_input("Press enter")

gives:

Traceback (most recent call last):
  File "it_iso.py", line 9, in <module>
    x.plot(s.filled(),gm)
  File "/lgm/uvcdat/2014-11-24/lib/python2.7/site-packages/vcs/Canvas.py", line 2589, in plot
    a = self.__plot( arglist, keyargs )
  File "/lgm/uvcdat/2014-11-24/lib/python2.7/site-packages/vcs/Canvas.py", line 3649, in __plot
    returned_kargs = self.backend.plot(*arglist,**keyargs)
  File "/lgm/uvcdat/2014-11-24/lib/python2.7/site-packages/vcs/VTKPlots.py", line 395, in plot
    returned.update(self.plot2D(data1,data2,tpl,gm,vtk_backend_grid=vtk_backend_grid,vtk_backend_geo=vtk_backend_geo))
  File "/lgm/uvcdat/2014-11-24/lib/python2.7/site-packages/vcs/VTKPlots.py", line 1128, in plot2D
    returned.update(self.renderTemplate(tmpl,data1,gm,t,z))
  File "/lgm/uvcdat/2014-11-24/lib/python2.7/site-packages/vcs/VTKPlots.py", line 1220, in renderTemplate
    zunits.string=zaxis.units
AttributeError: 'TransientAxis' object has no attribute 'units'