Hi,
I have LV2012, NI PXIe-6341 and I have measured voltages at channels AI0:AI5 in RSE mode. It worked like a charm.
Then a need for measurement in differential mode emerged on channel AI1. The AI1- was wired on place, the initialization in LV was changed to set the channels as Differential. The channel AI1 was measurig correctly which was confirmed with a multimeter. But, of course the other channels that are still connected for the RSE mode are reading nonsense.
I found that it is possible to set a mode for every channel separately. I did so, but now the measurements on AI1 are all wrong (e.g. 0.12V instead of 0V, 0.50V instead of 0.06V). When I change settings back to all Differential, the AI1 is good again.
Could you please look into the code attached and share if you find anything? 
