PyNIO and NetCDF file sizes - File too large

From: Carl Drews <drews_at_nyahnyahspammersnyahnyah>
Date: Tue Jan 19 2010 - 10:35:09 MST

I am attempting to open a 17 Gigabyte NetCDF file:

16949113596 Jan 18 04:51

using this Python code:

import Nio
import matplotlib
from pylab import *
import numpy
# open the NetCDF file for reading
print "Nio version ", Nio.__version__
file = Nio.open_file(romsFile, 'r')

Here is the script output:

ROMS file =
Nio version 1.3.0b1
fatal:File too large
fatal:Could not open (
Traceback (most recent call last):
   File "", line 188, in <module>
     file = Nio.open_file(romsFile, 'r')
   File "/usr/local/python/lib/python2.5/site-packages/PyNIO/",
line 512, in open_file
     file = _Nio.open_file(filename,mode,options,history,format)
NIOError: Unable to open file

Is there a limit on the NetCDF file size? I need to read several
variables from this model output. Do I have to split the ocean_his-T1
file into multiple variables? If so, what maximum size is allowed?

Here is my system information (uname -a):

Linux acd-xxxxxx #1 SMP Wed Nov 4
09:36:36 EST 2009 i686 i686 i386 GNU/Linux


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Received on Tue Jan 19 10:35:15 2010

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