Hi all, I've read the end of this page <a href="https://nagios.sgs.net/nagios/docs/objectinheritance.html" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">https://nagios.sgs.net/nagios/docs/objectinheritance.html </a> about multiple inheritance sources. I'm going to explain what I want with an example : I have a template for windows-servers with an hostgroups variable defined. I have another template for ABC-servers with also an hostgroups variable defined ( ABC is a project name). I want my server to belong to both. I defined a new host like this : define host { name windows-server hostgroups windows-server ... register 0 } define host { name ABC-server hostgroups ABC-server ... register 0 } define host { use windows-server,ABC-server ... } The problem, and according to the documentation, is that only the hostgroups variable of the first template is kept. Is it possible to add a concatenation feature to this inheritance, for example by adding a + in front of the hostgroups name ? If I define a template like this : define host { name ABC-server hostgroups +ABC-server ... register 0 } I would like the hostgroups variable to be concatenated to the previous ones inherited from other templates. I thought it was the expected behavior but it doesn't work. Thanks, -- L.B.