Hi Bill,
For the Aux instead of using 2:8 for the Aux bank/bus to change try a single number.
1-8 for Bank 1, Aux 1-8
9-16 for Bank 2, Aux 1-8
etc..
So, to change Bank 2, Aux 3 you would use:
XPT AUX:11:IN:3
This should be available in Software Versions 16.1d
We are considering supporting the format you've described above in the future as it is more intuitive.
Troy.
#Carbonite