The vi is not there. However, I suspect that you are using a tunnel instead of a shift register to pass your data into your loop. The tunnel will read the initial value passed into the loop upon each iteration whereas the shift register is designed to pass data from one iteration of the loop to the next.
If this isn't the problem then try attaching the code again.
P.S. It looks like Altenbach got this one while I was typing.
Message Edited by John Rich on 05-16-2005 12:46 PM