[Greg McKaskle]

I saw the same thing in Dallas, and it took awhile to troubleshoot.

To summarize all the good advice you've already received.

Use a MM to verify the voltage at the analog breakout. Verify you have a jumper on the correct two pins. Verify this is in slot 1.

If no luck, swap analog breakouts -- they are the weakest link.
If no luck, swap the module.

If no luck, open Robot Main, open the Start Communication subVI. Scroll to the right and find the place where Get Average Voltage is being read. Probe the value and the error output. See if the value is correct at that point but not getting to the DS properly (never seen this, but worth checking). Verify you aren't getting an error reading the voltage because the channel is reserved elsewhere.

In Dallas, I had to switch things to slot 2 to get it to work. The place you probed in Start Communications has a constant with the slot. Move the analog breakout or module and breakout to slot two. If this works, you need to explain to the inspector that the other slot doesn't work and hopefully they will let it pass.

I didn't have time to look at things more closely in Dallas, but suspect a bent pin or swarf in the connector.

Greg McKaskle