Hi, Even I am struck in the same kind of problem. "RuleBaseTask failed: [Error: unable to resolve method using strict-mode: com.nph.radar.drools.UpdateQuery.updateQuery(com.nph.radar.rule.operands.Query, com.nph.radar.rule.operands.AOCCRuleKnobConfig, java.lang.String, org.apache.log4j.Logger)]" [Near : {... updateQuery($query, $aoccRuleK ....}] This is the error I am getting while compiling drl file. I am calling a method in the when clause. The same code works fine in eclipse. Error is when I am compiling using ant script. Eclipse is doing some settings, that even I got to do in ant script. I am using drools 5.5.0 and eclipse indigo. Code : function String updateQuery(Query querie, AOCCRuleKnobConfig aoccRuleKnobConfig, String advPgmExclude, Logger log){ } rule "ExecuteQuery" //include attributes such as "salience" here... no-loop true salience 9 when //conditions $aoccRuleKnobConfig : AOCCRuleKnobConfig($commissionThreshold : commissionThreshold) $query : Query(name == "Account-Eligibility-Criteria" , $statement : statement) Query(name == "AdvisoryProgramExclusion" , $advPgmExclude : statement) $order : Order() from hibernateSession.createSQLQuery(updateQuery($query, $aoccRuleKnobConfig, $advPgmExclude, log)) .addScalar("id",LongType.INSTANCE) .addScalar("totalCommission", BigDecimalType.INSTANCE) .setResultTransformer(Transformers.aliasToBean(com.nph.radar.rule.operands.Order.class)).list(); then end Thanks in advance. -- View this message in context: http://drools.46999.n3.nabble.com/unable-to-resolve-method-using-strict-m... Sent from the Drools: User forum mailing list archive at Nabble.com.