Hi, Iam trying to upgrade to 5.3.1 final from Drools 5.1 during the process came across an issue where a simple rule detailed below has an issue when migrating with respect to the "grade contains("A") || grade contains("B") || grade contains("C")" part, This was working in Drools 5.1, any inputs as in how to restructure this will be helpful rule "Some - Definitions" when $comp : Company() $emp:Employee(grade contains("A") || grade contains("B") || grade contains("C")) then System.out.println("EMployee is an operations executive"); end Thanks Swaroop -- View this message in context: http://drools.46999.n3.nabble.com/Need-help-with-a-simple-predicate-tp368... Sent from the Drools: User forum mailing list archive at Nabble.com.