I did try this modification to the code with little luck. I'm getting the correct abount of data out but only the firest 4 chunks are correct. I did notice, after printing out the $outblocksize that a few were not multiples of 8 which shouldn't happen. There is no corruption in the data as I've ran an extremely slower piece of code on a smaller sample with the correct data being produced. I'll post that piece of code Monday since it's on my machine at work. Any ideas until then??