Adam,
OK well found out that it does run via a crontab job, so firstly check to see if these lines are in your /etc/crontab file somewhere:
# Generate SARG reports
01 0 * * * root /usr/sbin/sarg.daily.e-smith &>/dev/null
05 0 * * 1 root /usr/sbin/sarg.weekly.e-smith &>/dev/null
10 0 1 * * root /usr/sbin/sarg.monthly.e-smith &>/dev/null
If they are in there and you are not getting erros from crontab everyday then I would reinstall, if they are not there, check to see if there is a template fragment here:
/etc/e-smith/templates/etc/crontab/sarg
If that template is not there, I would suggest reinstalling, but if it is there, I would sugest re-expanding the template:
/sbin/e-smith/expand-template /etc/e-smith/templates/etc/crontab
And then checking to see if it is the crontab file, if it is then wait overnight to see if it worked, if it didnt and everything is there I would just try uninstalling it and reinstalling it from scratch, that's all I can think of

Cyrus Bharda