ipdevpolld down

Hi all, We are test driving NAV. I just have nav-4.5.3 installed on our CentOS7 test box. I can now log into the web console and start to add devices. But when I launch the daemon, the ipdevpolld will never stay up, I just wonder I can debug this problem, ipdevpoll does not have any information about why ipdevpolld won't stay up. Thank you very much for your help. Zhi-Wei Lu IET-CR-Network Operations Center University of California, Davis (530) 752-0155