I resolve the problem doing a clean install (OS and Software) but not installing the modules from cpan. Since Centos 7, to avoid problems you have to install from .rpm using yum. When you install from cpan, the system doesn't know what are you installing from cpan. I guess will be the same thing with the new systemd. What I am trying do to right now is to scan devices using the agent but doesn't work and no errors in log, only the OS who has installed the agent send info to OCS, they can't retrieve or scan thru snmp to send at OCS.