stacktrace_oct2pyerr

Error
Traceback (most recent call last):
  File "/home/bolster/src/aietes/src/contrib/Ghia/ecea/mfiles/test_ecea.py", line 53, in test_Phi
    oct_phi = octave.Set_State_Propagation_Matrix(sim_conf)
  File "/usr/local/lib/python2.7/dist-packages/oct2py/session.py", line 364, in octave_command
    return self.call(name, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/oct2py/session.py", line 177, in call
    argin_list, load_line = self._writer.create_file(inputs)
  File "/usr/local/lib/python2.7/dist-packages/oct2py/matwrite.py", line 69, in create_file
    savemat(self.in_file, data, appendmat=False, oned_as='row')
  File "/usr/lib/python2.7/dist-packages/scipy/io/matlab/mio.py", line 270, in savemat
    MW.put_variables(mdict)
  File "/usr/lib/python2.7/dist-packages/scipy/io/matlab/mio5.py", line 866, in put_variables
    self._matrix_writer.write_top(var, asbytes(name), is_global)
  File "/usr/lib/python2.7/dist-packages/scipy/io/matlab/mio5.py", line 617, in write_top
    self.write(arr)
  File "/usr/lib/python2.7/dist-packages/scipy/io/matlab/mio5.py", line 644, in write
    self.write_struct(narr)
  File "/usr/lib/python2.7/dist-packages/scipy/io/matlab/mio5.py", line 749, in write_struct
    self._write_items(arr)
  File "/usr/lib/python2.7/dist-packages/scipy/io/matlab/mio5.py", line 759, in _write_items
    % (max_length-1))
ValueError: Field names are restricted to 31 characters