[Xymon] Issue: graphs not updating

Hi everyone,

i'm trying to introduce Xymon in my new company, so i've installed xymon on centos7 with precompiled packets from epel repo.

All was going fine until a reboot: it happens that graphs are not updated: I see the correct "updated at..." but the line ends. More clear here

https://postimg.org/image/6a5viq3yn/

Restarting the service or rebooting the machine solves temporary the problem, but it comes back. The services seem to be up and running. Tried disabling selinux, without results. I did not find anything clear in the logfiles.

Version is 4.3.27-1.el7

Please help :) Thanks in advance

Alessandro Tinivelli