[rules-users] Nesting prefix-or and prefix-and causing parsing problem

Hi, I have a problem with nesting prefix-and and prefix-or. I found a bug in JIRA but it been fixed in drools expert 5.0. Here is snippet to reproduce the problem (based on the original rule). I get the following error : java.lang.RuntimeException: [48,5]: [ERR 102] Line 48:5 mismatched input 'EmployeePreferredShift' in rule "assign-preferred-position" declare EntityA number : int end declare EntityB number : int end declare EntityC number : int end rule "and-or-snippet" dialect "java" when EntityA( $number : number) not ( and EntityB ( number == $number ) ( or ( and EntityC ( number < $number) not EntityB ( number == 4) ) not EntityC ( number == 10 ) ) EntityA ( number <= $number ) ( or not EntityC ( number >= $number) ( and EntityC ( number == 4 || number >=10 ) not EntityB ( number == -3) not EntityB ( number == -10 ) ) ) not EntityB( number == 0) ) then System.out.println("Working"); end Patrik Dufresne