I'd try using free-format DRL and breaking the expression down into smaller parts until it works.

I can't see anything wrong with the syntax - unless it relates to the bug Wolfgang said was fixed for 5.4.0 (I *assume* he'd mean FINAL).

The advice, as I have given before, would not to use a beta version as it is bound to have bugs in that were fixed for FINAL.

I know you use it for the free-format text "Formula" TextBox in the RHS of the Guided Editor, but free-format DRL (with 5.4.0.FINAL) is a suitable workaround.

On 24 May 2012 14:55, zeeshan <zeeshan.spring@gmail.com> wrote:
oops......now I tried by putting $ before sumAssured....still same 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(
$deathBenefit );: [Error: unable to resolve method using strict-mode:
org.drools.spi.KnowledgeHelper.,$policyTerm()] [Near : {...
($interestRate/100),$policyTerm-$policYear+1) ) ) ....}] ^ [Line: 1, Column:
91]*


the source 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*

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