-def $MUNIN_IPS = (<%= v4ips.split(',').join(' ') %>);
-def $MUNIN6_IPS = (<%= v6ips == 'no' ? '' : v6ips.split(',').join(' ') %>);
+def $MUNIN_IPS = (<%=
+begin
+ v4ips.split(',').join(' ')
+rescue
+ ''
+end
+%>);
+def $MUNIN6_IPS = (<%=
+begin
+ v6ips == 'no' ? '' : v6ips.split(',').join(' ')
+rescue
+ ''
+end
+%>);
domain ip {
chain INPUT {