Running error

Binary package hint: epigrass

i installed epigrass sucessfully from deb package http://launchpadlibrarian.net/20862136/epigrass_1.5.1-4_all.deb

irun it
#epigrass
and i ve got that
/usr/lib/python2.5/site-packages/matplotlib/__init__.py:755: UserWarning: This call to matplotlib.use() has no effect
because the the backend has already been chosen;
matplotlib.use() must be called *before* pylab, matplotlib.pyplot,
or matplotlib.backends is imported for the first time.

  warnings.warn(_use_error_msg)
/usr/lib/python2.5/site-packages/visual/array_backend.py:7: ImportWarning: Not importing directory '/usr/lib/python2.5/site-packages/Numeric': missing __init__.py
  import Numeric
QInputContext: no input method context available
QInputContext: no input method context available
Traceback (most recent call last):
  File "/usr/bin/epigrass", line 273, in onRun
    self.readGui()
  File "/usr/bin/epigrass", line 252, in readGui
    os.chdir(os.path.split(self.conf['model.script'])[0])
OSError: [Errno 2] Aucun fichier ou dossier de ce type: ''