[rules-users] LHS function call

Hello, I get the following error message when attempting to use a function call on the LHS a rule: "unable to resolve method using strict-mode: java.lang.Object.normalizedLoad2(...)" My rule and function: <code> rule NarrowByParticipantLoad dialect "mvel" salience -75 when $nd1 : NurseDetails() $nd2 : NurseDetails() eval(normalizedLoad2( $nd2.hoursPerWeek, $nd2.assignmentCount ) > normalizedLoad2($nd1.hoursPerWeek, $nd1.assignmentCount )) then retract( $nd2 ); end function double normalizedLoad2( int hoursPerWeek, int assignmentCnt ) { if (hoursPerWeek == 0) { return 0.0; } return (double)assignmentCnt / (double)hoursPerWeek; } </code> I am using v 4.0.1. It was my understanding that this should be legal. Is it obvious what I might be ding wrong here? Thank you, Mark