We have tried two scripts to update our clients. The first keeps installing the client after each reboot.
nwsetup /acu /u

Next we tried editing the acu.ini
We selected use=yes and and putting the path and filename of unattend.txt in filename=

afterwards we tried the following script

nwsetup /acu
This updated the client but did not use the unattend.txt.

Am I missing something?