command "importdata" causes an error

[tomberlan]

Hi,
Thank you for your very helpful work.
I successfully used it to call a matlab script from a pyhton program.
However, as soon as I include the MATLAB command "importdata", I got an error.
I copy below the complete error message:
Traceback (most recent call last):
File "./solver.py", line 72, in
print solve_it(input_data)
File "./solver.py", line 19, in solve_it
print mlab.run('test.m', {'address': sys.argv})['result']
File "/Users/tbegin/Desktop/Discrete-Optimization/knapsack/pymatbridge/init.py", line 87, in run
result = self._open_page(self.eval_func, page_args)
File "/Users/tbegin/Desktop/Discrete-Optimization/knapsack/pymatbridge/init.py", line 94, in _open_page
return json.loads(page.read())
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/init.py", line 338, in loads
return _default_decoder.decode(s)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/decoder.py", line 365, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/decoder.py", line 383, in raw_decode
raise ValueError("No JSON object could be decoded")
ValueError: No JSON object could be decoded

Hope you can help me with that.