utm package error - need your help

[Tyagi_j]

the previous error :

Error:
if strict:
---> 68 if not 100000 <= easting < 1000000:
69 raise OutOfRangeError('easting out of range (must be between 100.000 m and 999.999 m)')
70 if not 0 <= northing <= 10000000:

python2.7/site-packages/pandas/core/generic.pyc in __nonzero__(self)
953 raise ValueError("The truth value of a {0} is ambiguous. "
954 "Use a.empty, a.bool(), a.item(), a.any() or a.all()."
--> 955 .format(self.__class__.__name__))
956
957 __bool__ = __nonzero__

ValueError: The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all().

even i tried to convert the values to float