Baffling unpack() or read() problem......

[Matthew Joyce]

The code below runs perfectly on Linux on very large files of binary
data. However it believes it's got to the end of the file prematurely
in Windows after reading a variable number of sequences of 16 bytes.

Why should it work in Linux and not Windows? What am I missing?

matt
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from struct import *
import sys
import string
import os.path
rawinfile=open(os.path.abspath("nt.raw"),"r")
rawstring = rawinfile.read(16)
while rawstring != "":
    unpack("4L",rawstring)
    rawstring = rawinfile.read(16)
rawinfile.close()