The use of AND in source pattern of accumulate causes compilation error in executable model. -------------------------------------------------------------------------------------------- Key: DROOLS-5928 URL: https://issues.redhat.com/browse/DROOLS-5928 Project: Drools Issue Type: Bug Components: executable model Reporter: Mario Fusco Assignee: Mario Fusco Priority: Major Labels: support Attachments: reproducer_model_compiler_7a.zip Building a rule written in MVEL dialect like (*1) using {{AND}} in source pattern of {{accumulate}} like (\*1-1) in executable rule model, a compilation error (\*2) occurs. This issue does not occur when we build the rule with executable model disabled. (\*1) {noformat} package com.example.reproducer import java.math.BigDecimal dialect "mvel" rule "rule7a2" when $total : BigDecimal() from accumulate( $car : Car( discontinued == true ) and Order( item == $car, $price : price ), // ..... (*1-1) init( BigDecimal total = BigDecimal.ZERO; ), action( total += $price; ), reverse( total -= $price; ), result( total ) ) then System.out.println("***** Action of rule7a2 -- $total = " + $total); end {noformat} (\*2) {noformat} [ERROR] /work2/testdir/reproducer_model_compiler_7a/target/generated-sources/drools-model-compiler/main/java/com/example/reproducer/Rulese69ee9f6a2a84acaa675792cae099156RuleMethods0.java:[28,63] method accumulate in class org.drools.model.DSL cannot be applied to given types; required: org.drools.model.view.ViewItem<?>,org.drools.model.functions.accumulate.AccumulateFunction,org.drools.model.functions.accumulate.AccumulateFunction[] found: org.drools.model.view.ViewItem reason: cannot infer type-variable(s) T (actual and formal argument lists differ in length) {noformat}