This is a VI I wrote to program an Analog Devices digital potentiometer (AD5172). It worked well until a wiring mishap damaged the I2C device... I replaced it with an Aardvark controller.
jm: the VI you posted is in 8.5, and the new poster indicated they have 8.2, so they will not be able to open your example.
ct loh: those examples would only get installed if you installed the software for the USB-8451. You would need to indicate during the installation to include LabVIEW support and LabVIEW examples. Have you installed this software?
smercurio...: abon27 is the poster; ct loh specified 8.2.
I know. That's why I said new poster.