After some more investigation, I managed also to make it work with collect: http://drools.pastebin.com/m14f0e329
I would rather not multiplicate rules, because we probably will have dozens for our system which is very big and can supervise around a thousand equipements in some cases Thank you very much for the advices Aldian _______________________________________________ rules-users mailing list rules-users@lists.jboss.org http://lists.jboss.org/mailman/listinfo/rules-users