Drools decision table with contains operator in a conditional group not working ------------------------------------------------------------------------------- Key: DROOLS-866 URL: https://issues.redhat.com/browse/DROOLS-866 Project: Drools Issue Type: Bug Components: decision tables Affects Versions: 6.2.0.Final Environment: Windows 7 Reporter: lucio piccoli Assignee: Michael Anstis Priority: Major Attachments: FeePricing-grouping-error.xls, PricingRuleGroupingExample.java I cannot get the Decision Table to using grouping in the expression. Decision Table ------------------------------------ <row 10> CONDITION <row 12> classList $param expressions are in each row. <row 43> (contains('AAA') || contains('BBB') ) && contains('CCC') <--fails to compile <row 44> (contains('AAA') || contains('BBB') <row 45> (contains('AA') || contains('BB') || contains('CCC') || contains('DDD') where the fact classList is List<String> classList = {'AAA', 'BB'.....} the rule43 is meant to fire if the list contains either 'AAA' OR 'BBB' AND 'CCC' however the decision table parser is failing with exception for rule 43 [Error: Missing left node] [Near : {... classList (contains("AAA") || contains("CCC")) ....}] i have a similar rule working fine for other rows <row 42> contains('AAA') || contains('BBB') || contains('CCC') there seems to be something strange with using the contains operator in a group condition.