Linux to Windows porting question

[SHELTRAW, DANIEL]

Hello Pyhton Listees

I am trying to port some code to Windows that works fine under Linux. The offending line
is:

    blk = fromstring(f_fid.read(BLOCK_LEN), num_type).byteswapped().astype(Float32).tostring()

The error I get is:

    ValueError: string size must be a multiple of element size

Does anyone have an idea where the problem might be? BLOCK_LEN is specified in bytes
and num_type is Int32.

Thanks,
Daniel