Either the documentation or the template is wrong for HP-UX for the following items:

system.maxfiles
system.maxproc
6 items net.if.in, net.if.out
9 items proc.num
3 items sensor
system.boottime
system.cpu.util[,iowait,avg1]
3 items system.swap

They are in the AIX template (Type Zabbix agent), but the documentation (2.0) says, they're not supported.