I am getting the following strange error

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-2.84543 2.20867
-7.37183 31.0363
RD new flooding
-8.6285 32.3637
RD new flooding
-9.08371 32.4054
RD new flooding
/media/planet/MyBook/Hycom/2014/HYCOM_GLBa0.08_2014_185.nc
Creating boundary file /home/planet/PyROMS/Ocean/Boundary/Bry_2014/Outputs/HYCOM_GLBa0.08_2014_185_ssh_bdry_OCEGRID.nc
Traceback (most recent call last):
File "make_bdry_file.py", line 78, in <module>
results = p.map(do_file, lst_file)
File "/usr/lib/python2.7/multiprocessing/pool.py", line 251, in map
return self.map_async(func, iterable, chunksize).get()
File "/usr/lib/python2.7/multiprocessing/pool.py", line 567, in get
raise self._value
IndexError: index -9223372036854775808 is out of bounds for axis 0 with size 33
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I was trying to create daily boundary files for year 2014 using HYCOM data. The script successfully created files for first 110 Days and got stopped with this error. I would be grateful if anybody can give suggestions to solve the error. Thanks ALL.