Please refer to the usage of the 'names' syntax located at http://www.cisco.com/univercd/cc/td/doc/product/multisec/asa_sw/v_7_2/cmd_ref/no_711.htm#wp1646080
Sounds like your customer is working hard, and not smart. :o)The simple solution would be to add an Access Control Server and point the firewall to it. Setup the groups and assign the users accordingly. If you need to permit/deny based on time, you...
Ive seen that error message a lot when an engineer overlooks their static statements.since we cannot see your config, take a look at it yourself and see if there is a misconfiguration.