Hi Mike ! I tried with prefix $ too on the RHS, still giving error....
*[DeathBenefitRule] Unable to Analyse Expression $deathBenefit.setSumAssured( sumAssured * ( 1 - (1 / (Math.pow ( (1 + ($interestRate/100),$policyTerm-$policYear+1) ) ) ) ) / (1 - (1 / (Math.pow ( (1 + ($interestRate/100),$policyTerm) ) ) ) ) ); drools.update( $deathBenefit );: [Error: unable to resolve method using strict-mode: org.drools.spi.KnowledgeHelper.sumAssured()] [Near : {... efit.setSumAssured( sumAssured * ( 1 - (1 / (Math. ....}] ^ [Line: 1, Column: 30]* the sorce code ----> *1. | rule "DeathBenefitRule" 2. | dialect "mvel" 3. | when 4. | $deathBenefit : DeathBenefitFactModel( $sumAssured : sumAssured, $interestRate : interestRate, $policYear : policYear, $policyTerm : policyTerm) 5. | then 6. | $deathBenefit.setSumAssured( sumAssured * ( 1 - (1 / (Math.pow ( (1 + ($interestRate/100),$policyTerm-$policYear+1) ) ) ) ) / (1 - (1 / (Math.pow ( (1 + ($interestRate/100),$policyTerm) ) ) ) ) ); 7. | update( $deathBenefit ); 8. | end* -- View this message in context: http://drools.46999.n3.nabble.com/How-to-put-Power-in-Formula-box-of-THEN-tp4013154p4013548.html Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users