Hi, We have rules in domain specific language that don't work anymore. In our dsl mapping definition: Language expression: COUNT\({attr:[A-Z][A-Z_\d]+}\) {constraint:(>|>\=|<|<\=|\=\=|!\=)} {num:[\d\.]+} Rule mapping: ArrayList( size {constraint} {num} ) from collect (Fact( name == "{attr}", dataset == "0", ignore == "false" )) Scope: condition (when) [condition][]COUNT\({attr:[A-Z][A-Z_\d]+}\) {constraint:(>|>\=|<|<\=|\=\=|!\=)} {num:[\d\.]+}=ArrayList( size {constraint} {num} ) from collect (Fact( name == "{attr}", dataset == 0, ignore == false )) One of the rules: rule 'BP - HOMULTIPLE' agenda-group "user-rules" no-loop true when COUNT(BP_HOCONDITION) >= 2 then set BP_HOMULTIPLE end Expanded rule should be something like this: rule 'BP - HOMULTIPLE' agenda-group "user-rules" no-loop true when ArrayList(size >= 2) from collect (Fact( name == "BP_HOCONDITION", dataset == "0", ignore == "false" )) then insertLogical(new StateFact("BP_HOMULTIPLE")); end Everything was working with Drools 5.1 but with Drools 5.4.0.Final, we have this kind of errors: [3788,20]: [ERR 101] Line 3788:20 no viable alternative at input '>=' in rule "BP - HOMULTIPLE" Did we forget something? Thanks, Jean-Luc -- View this message in context: http://drools.46999.n3.nabble.com/No-viable-alternative-at-input-since-up... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users