[rules-dev] Trouble using constants to access Maps

Hi all! I'm writing a rule that contains the following statement: $agreementOffer:AgreementOffer($logicalFixedNumber:configurationParameters["6410"]) This results of this is not surprisingly that both $agreementOffer and $logicalFixedNumber get assigned a value. Instead of using the "magic value" 6410, I want to use ParameterId constant class, which implements the toString() to return the value. I have tried several different ways to refer to the constant but without luck. The errors says: Unable to create Field Extractor for 'configurationParameters[ParameterId.LOGICAL_NUMBER_FIXED] I have also tried to extract the value of the ParameterId.LOGICAL_NUMBER_FIXED into a local variable, which I can see prints the correct value, but the error says the same: Unable to create Field Extractor for 'configurationParameters[$logicalNumberFixedConstant] Do anyone understand what is happening here and what I do wrong? I'm are still on the JKD 1.4, and uses MVEL 1.3 Thanks, @ndré -- View this message in context: http://n3.nabble.com/Trouble-using-constants-to-access-Maps-tp178720p1787... Sent from the Drools - Dev mailing list archive at Nabble.com.