[ https://issues.jboss.org/browse/DROOLS-172?page=com.atlassian.jira.plugin... ] Davide Sottara commented on DROOLS-172: --------------------------------------- Fabian, I'm out of town this week and the connection is bad, sorry if it takes long to answer. It is actually expected that two proxies, one for B and one for C, are created. B and C may expose totally different properties of an underlying object. I see, however, the problem: the query returns two "A" instances, even if we are talking about the same "core" object. Some changes are being merged that improve unwanted side effects of this implementation choice in "modify", but I didn't work on queries yet. Can you try if query "traitA" a : Object( this isA A ) end works better? -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira