Exception: tables cannot write this data ->
I have been encountering this error when reading a large csv file and writing to HDFStore table. Initially this error would occur if I would read a large chunk from csv for e.g. > 200000 rows on the sencond or third chunk. Hence I resorted to reading a smaller chunk of 100000 and appending to table and program seemed to run fine upto the 178th chunk thus indicating that there isn't any problem with the data in the first few 100,000's of rows that would cause the exception to be raised.

Please refer to http://stackoverflow.com/questions/18343726/pandas-hdfstore-append-data-columns-after-append-operation for the code I'm running.  

Traceback (most recent call last):
  File "D:\AIMS\csvtohdf.py", line 99, in <module>
    f.append('df', chunk) #, dtype=dt, data_columns = ['MONTH', 'COD', 'FLNLOCCOD', 'ISO', 'OR', 'DES', 'MAIN', 'SHARE', 'TYPE'])
  File "D:\Python27\lib\site-packages\pandas\io\pytables.py", line 658, in append
    self._write_to_group(key, value, table=True, append=True, *_kwargs)
  File "D:\Python27\lib\site-packages\pandas\io\pytables.py", line 923, in _write_to_group
    s.write(obj = value, append=append, complib=complib, *_kwargs)
  File "D:\Python27\lib\site-packages\pandas\io\pytables.py", line 3012, in write
    self.write_data(chunksize)
  File "D:\Python27\lib\site-packages\pandas\io\pytables.py", line 3056, in write_data
    values=[v[start_i:end_i] for v in values])
  File "D:\Python27\lib\site-packages\pandas\io\pytables.py", line 3079, in write_data_chunk
    raise Exception("tables cannot write this data -> %s" % str(detail))
Exception: tables cannot write this data -> 

I am using Windows 7 with a 32-bit version of both windows and python.
## INSTALLED VERSIONS

Python: 2.7.3.final.0

Cython: 0.19.1
Numpy: 1.7.1
Scipy: Not installed
statsmodels: Not installed
    patsy: Not installed
scikits.timeseries: Not installed
dateutil: 1.5
pytz: Not installed
bottleneck: Not installed
PyTables: 3.0.0
    numexpr: 2.1
matplotlib: Not installed
openpyxl: 1.5.7
xlrd: 0.7.1
xlwt: Not installed
sqlalchemy: 0.6.6
lxml: Not installed
bs4: 4.1.3
html5lib: Not installed
