This function if it's not used in the proper way will not allow you
to populate the alerts.details table from the rule file. For example,
if you put the following line in your rules file and then add
details($*) at the end of the rules file, you won't be able to see
anything in the details tab.
Alerts = registertarget( "NCOMS", "", "alerts.status")
I have changed it to:
Alerts = registertarget( "NCOMS", "", "alerts.status", "alerts.details")
and things start working as expected.