Hello guys, I have just obtained this DroolsRuntimeException when i perform this rule: $result : Number( ) from accumulate ( ($y: Year( ) from $o.data) && (Family( $relatives : relative ) from $y.familyEntity), init( double total = 0; ), action( total += $relatives.size(); ), reverse( total -= $relatives.size(); ), result( total ) ) I saw that this is a known bug in version 5.3.0. I'm developing with 5.5.0 Final. Exists any workaround or version 5.6.0 resolve this bug? Best regards Andrea -- View this message in context: http://drools.46999.n3.nabble.com/BUG-Can-t-build-a-rete-network-with-an-... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

I tried what you said: $o: FamilyData( identifierCode == "PCFNDR85E15H501S" ) $y: org.titan.family.filter.YearData( ) from $o.data.get(0) $e: FamilyEntity( ) from $y.familyEntity.get(0) $result : Number( ) from accumulate ($r: Relative( ) from $e.relative, count($r)) in this way works! For the truth this operation is not intuitive... I don't believe I can use this way because i have to map these queries in DSLs and i would map only last line in a language statement. Can you think of another solution? Otherwise i have to seek for another mapping strategy. I thank you for the time. Andrea -- View this message in context: http://drools.46999.n3.nabble.com/BUG-Can-t-build-a-rete-network-with-an-... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users