Nope... I just realized what's going on here. Long story short, you can't do this. It's not possible to change the IO Resources at run-time (the routing gets programmed into the bitfile), so instead of throwing an error when you try, we just don't let you. I'm guessing that the 2011 behavior was a RIO error on the RT host side if you changed the value from the default.
Cheers!
TJ G
