My rule that I'm using in unit testing only looks like this: rule "Testing contains" dialect "mvel" when Response( $answerSelections : answerSelections ) AnswerSelection( answer.ID in (2, 3) ) then System.out.println("Testing contains activated") end Response has a getAnswerSelections() method. AnswerSelection has a getAnswer() method. Answer has a getID() method. During rule compilation, I get the following error: Unable to Analyse Expression answer.ID == 2 || answer.ID == 3: [Error: Failed to compile: 1 compilation error(s): - (1,9) unqualified type in strict mode for: ID] [Near : {... Unknown ....}] ^ [Line: 1, Column: 0] : [Rule name='Testing contains'] If I rewrite the rule using "||" explicitly I get the same error. This didn't happen under 5.1.1. I'm aware that 5.2.0-SNAPSHOT is a...um...work in progress. :-) But the DRL compilation has worked up till now. Is my rule syntax OK? Do I just need to wait? Best, Laird -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Drools-5-2-0-SNAPSHOT... Sent from the Drools - User mailing list archive at Nabble.com.