hello all, I am a newbi on Drools and started my test work with a modified exapmle included in drools v4.0.7.The compiled drl from a very simple modified xls file is like the follwing : ----------------------code----------------------- package org.drools.examples.decisiontable; #generated from Decision Table import org.apache.commons.lang.time.DateUtils; import java.util.Date; #From row number: 11 rule "Pricing bracket_11" when DateUtils.SEMI_MONTH==1001 then policy.setBasePrice(9999999); end -------------------------code--------------------- but I got an exception stack when trying to addPackage after compile : --------------stack---------------- Exception in thread "Main Thread" org.drools.rule.InvalidRulePackage: [9,22]: unknown:9:22 mismatched token: [@46,221:222='==',<76>,9:22]; expecting type LEFT_PAREN at org.drools.rule.Package.checkValidity(Package.java:424) at org.drools.common.AbstractRuleBase.addPackage(AbstractRuleBase.java:394) at org.drools.examples.PricingRuleDTExample.buildRuleBase(PricingRuleDTExample.java:67) at org.drools.examples.PricingRuleDTExample.executeExample(PricingRuleDTExample.java:38) at org.drools.examples.PricingRuleDTExample.main(PricingRuleDTExample.java:26) --------------stack---------------- yes,I was trying to test the usage of org.apache.commons.lang.time.DateUtils inside a xls file,but it seemed something went wrong.Can someone tell me what caused the exception? thanks a lot -- View this message in context: http://drools.46999.n3.nabble.com/a-newbi-question-tp3234838p3234838.html Sent from the Drools: User forum mailing list archive at Nabble.com.