package:xymon:4.3.28-3build1 Setting up xymon (4.3.28-3build1) ... chgrp: cannot access 'critical.cfg': No such file or directory chgrp: cannot access 'critical.cfg.bak': No such file or directory dpkg: error processing package xymon (--configure): installed xymon package post-installation script subprocess returned error exit status 1