The code example of fitLevel49.py gives an error

[arugak]

Hi
The code example of fitLevel49.py gives an error.

$ python fitLevel49.py
...
  File "BSIM3v3.py", line 684, in _DC_Curr
    for v in output:
NameError: global name 'output' is not defined

In order to fix this, I added default arguments "output = ('Id', 'Is', 'Isub')" to _DC_Curr (). But I do not know the author's intention. Is this correct?