StopIteration error when trying to import specific columns from Excel file using parse_cols
```
df = pd.read_excel(r'\\path_to_Excel_file', 
                   'Sheet1', parse_cols=['MODEL_YEAR'])

returns:

---------------------------------------------------------------------------
StopIteration                             Traceback (most recent call last)
<ipython-input-29-336e4fd9eea1> in <module>()
      4 
      5 df = pd.read_excel(r'\\path_to_Excel_file', 
----> 6                    'Sheet1', parse_cols=["MODEL_YEAR"])

D:\Miniconda3\envs\notebook\lib\site-packages\pandas\io\excel.py in read_excel(io, sheetname, **kwds)
    125     engine = kwds.pop('engine', None)
    126 
--> 127     return ExcelFile(io, engine=engine).parse(sheetname=sheetname, **kwds)
    128 
    129 

D:\Miniconda3\envs\notebook\lib\site-packages\pandas\io\excel.py in parse(self, sheetname, header, skiprows, skip_footer, index_col, parse_cols, parse_dates, date_parser, na_values, thousands, chunksize, convert_float, has_index_names, **kwds)
    236                                  skip_footer=skip_footer,
    237                                  convert_float=convert_float,
--> 238                                  **kwds)
    239 
    240     def _should_parse(self, i, parse_cols):

D:\Miniconda3\envs\notebook\lib\site-packages\pandas\io\excel.py in _parse_excel(self, sheetname, header, skiprows, skip_footer, index_col, has_index_names, parse_cols, parse_dates, date_parser, na_values, thousands, chunksize, convert_float, **kwds)
    355                             skip_footer=skip_footer,
    356                             chunksize=chunksize,
--> 357                             **kwds)
    358 
    359         return parser.read()

D:\Miniconda3\envs\notebook\lib\site-packages\pandas\io\parsers.py in TextParser(*args, **kwds)
   1285     """
   1286     kwds['engine'] = 'python'
-> 1287     return TextFileReader(*args, **kwds)
   1288 
   1289 

D:\Miniconda3\envs\notebook\lib\site-packages\pandas\io\parsers.py in __init__(self, f, engine, **kwds)
    555             self.options['has_index_names'] = kwds['has_index_names']
    556 
--> 557         self._make_engine(self.engine)
    558 
    559     def _get_options_with_defaults(self, engine):

D:\Miniconda3\envs\notebook\lib\site-packages\pandas\io\parsers.py in _make_engine(self, engine)
    698             elif engine == 'python-fwf':
    699                 klass = FixedWidthFieldParser
--> 700             self._engine = klass(self.f, **self.options)
    701 
    702     def _failover_to_python(self):

D:\Miniconda3\envs\notebook\lib\site-packages\pandas\io\parsers.py in __init__(self, f, **kwds)
   1392         # infer column indices from self.usecols if is is specified.
   1393         self._col_indices = None
-> 1394         self.columns, self.num_original_columns = self._infer_columns()
   1395 
   1396         # Now self.columns has the set of columns that we will process.

D:\Miniconda3\envs\notebook\lib\site-packages\pandas\io\parsers.py in _infer_columns(self)
   1607             columns = []
   1608             for level, hr in enumerate(header):
-> 1609                 line = self._buffered_line()
   1610 
   1611                 while self.line_pos <= hr:

D:\Miniconda3\envs\notebook\lib\site-packages\pandas\io\parsers.py in _buffered_line(self)
   1734             return self.buf[0]
   1735         else:
-> 1736             return self._next_line()
   1737 
   1738     def _empty(self, line):

D:\Miniconda3\envs\notebook\lib\site-packages\pandas\io\parsers.py in _next_line(self)
   1758                             break
   1759                 except IndexError:
-> 1760                     raise StopIteration
   1761         else:
   1762             while self.pos in self.skiprows:

StopIteration: 
```

Documentation says the following:
parse_cols : int or list, default None
- If None then parse all columns
- If int then indicates last column to be parsed
- If list of ints then indicates list of column numbers to be parsed
- If string then indicates comma separated list of column names and column ranges (e.g. “A:E” or “A,C,E:F”)

Also did:

```
df = pd.read_excel(r'\\path_to_Excel_file', 
                   'Sheet1', parse_cols="MODEL_YEAR")
```

But still got the same error.

```
Using Windows 7 with Miniconda3
conda list output:
beautiful-soup            4.3.2                    py34_0
beautifulsoup4            4.3.2                     <pip>
brewer2mpl                1.4.1                     <pip>
dateutil                  2.1                      py34_2
ggplot                    0.6.5                     <pip>
ipython                   2.3.1                    py34_0
jdcal                     1.0                      py34_0
jinja2                    2.7.3                    py34_1
lxml                      3.4.0                    py34_0
markupsafe                0.23                     py34_0
matplotlib                1.4.2                np19py34_0
numexpr                   2.3.1                np19py34_0
numpy                     1.9.1                    py34_0
openpyxl                  2.0.2                    py34_0
pandas                    0.15.1               np19py34_0
patsy                     0.3.0                np19py34_0
pip                       1.5.6                    py34_0
pycrypto                  2.6.1                    py34_2
pygments                  2.0.1                    py34_0
pyodbc                    3.0.7                    py34_0
pyparsing                 2.0.1                    py34_0
pyqt                      4.10.4                   py34_0
pyreadline                2.0                      py34_0
python                    3.4.2                         0
python-dateutil           2.1                       <pip>
pytz                      2014.9                   py34_0
pywin32                   219                      py34_0
pyzmq                     14.4.1                   py34_0
requests                  2.4.3                    py34_0
scipy                     0.14.0               np19py34_0
seaborn                   0.5.0                     <pip>
setuptools                7.0                      py34_0
six                       1.8.0                    py34_0
statsmodels               0.6.0                np19py34_0
tornado                   4.0.2                    py34_0
xlrd                      0.9.3                    py34_0
```
