Edson, Thanks for the tip - you are right - 'return' keyword should not be used - got to this one by trial & error just before I saw your reply :). The problem is that the only 'public' docs available on the new functionality (Wiki 3.1 release notes: http://wiki.jboss.org/wiki/Wiki.jsp?page=3.1M1ReleaseNotes) gives the example of 'accumulate' keyword where 'return' keyword IS used in the 'result' section! So, I guess this needs to be updated?.. Interestingly, "eval ($count < 4)" DOES work correctly and as expected! So, I guess that's an extra feature? :) Thanks for the example on how to avoid eval altogether - already tried it and it works like a charm! Nice functionality! Would it be worth it to include this in Wiki? Thanks, Vlad -----Original Message----- From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Edson Tirelli Sent: 06 March 2007 16:19 To: Rules Users List Subject: Re: [rules-users] what's wrong with this rule?... Vlad, You should not use the "return" keyword and the ";" inside the result block as it is implicit. Also, remember that anything inside eval() is pure java code, so you cant do $count < 4 if $count is an Integer object. Finally, try to always avoid eval() when writing rules. Try something like: *rule* "FG.23C" *when* *exists* Record( $psc : psc == "323", pa == "7[0-9]*", sa == "F39040" |== "F38010" |== "F38090" ) $count : Integer( intValue < 4 ) *from* *accumulate *( Record( psc == "323", pa *matches* "8[0-9]995", sa *matches* "F390[4-8][2-5]" ), init ( *int* count = 0; ), action( count += count; ), result( *new* Integer(count) ) ) *then* System.out.println( "rule FC.23C has failed" ); System.out.println(); *end* ** Please, let me know if it works. []s Edson Olenin, Vladimir (MOH) wrote: >Hi, > >I have the following rule: > >*rule* "FG.23C" > >*when* > >*exists* > >Record( $psc : psc == "323", > >pa == "7[0-9]*", > >sa == "F39040" > >|== "F38010" > >|== "F38090" ) > >$count : Integer() *from* *accumulate *( > >Record( psc == "323", > >pa *matches* "8[0-9]995", > >sa *matches* "F390[4-8][2-5]" ), > >init ( *int* count = 0; ), > >action( count += count; ), > >result( *return* *new* Integer(count); ) > >) > >*eval* ($count < 4 ) > >*then* > >System.out.println( "rule FC.23C has failed" ); > >System.out.println(); > >*end* > >* * > >And for some reason I can't compile correctly: I'm getting the >following error: > >org.drools.rule.InvalidRulePackage: Rule Compilation error This method >must return a result of type Integer Syntax error on token "(", ; >expected Syntax error on token ")", delete this token > >at org.drools.rule.Package.checkValidity(_Package.java:367_) > >at >org.drools.common.AbstractRuleBase.addPackage(_AbstractRuleBase.java:244_) > >at moh.ohfs.rules.RulesTest.readRule(_RulesTest.java:70_) > >at moh.ohfs.rules.RulesTest.main(_RulesTest.java:22_) > >All brackets seem to be matching.... This happens on 3.1M build. > >Thanks, > >Vlad > >------------------------------------------------------------------------ > >_______________________________________________ >rules-users mailing list &gt;rules-users(a)lists.jboss.org >https://lists.jboss.org/mailman/listinfo/rules-users > > > >