ValueError: invalid literal for float(): -1.#IND (pickle.py)

[Alexander Eisenhuth]

Hello together,

python: 2.5.1
palttform: winXP

I'm using pickle.dump and pickle.load with data that is created in a wrapped 
(boost.python) piece of C++ code. pickle.dump works fine. pickle.load creates 
the following exception:

[...]
     data = pickle.load(input)
   File "C:\Python25\lib\pickle.py", line 1370, in load
     return Unpickler(file).load()
   File "C:\Python25\lib\pickle.py", line 858, in load
     dispatch[key](self)
   File "C:\Python25\lib\pickle.py", line 954, in load_float
     self.append(float(self.readline()[:-1]))
ValueError: invalid literal for float(): -1.#IND

- I'm not sure what -1.#IND means. Can somebody assist?

- As pickle write the data I'm a bit confused, that is can't be unpickled it. Is 
that a bug or a feature?

BTW: I'm tied to version 2.5 of python

Thank and regards
Alexander